All Stories

  1. Importance of interfacial crystallinity to reduce open-circuit voltage loss in organic solar cells

    Article • Applied Physics Letters, October 2019, American Institute of Physics

    Masahiro Hiramoto

  2. Very low activation energy for carrier generation of surface doped organic single crystals observed by Hall effects

    Article • Applied Physics Letters, September 2019, American Institute of Physics

    Masahiro Hiramoto

  3. Mapping of band-bending for doped C 60 films

    Article • Applied Physics Express, July 2014, Japan Society of Applied Physics

    Masahiro Hiramoto

  4. Bandgap Science for Organic Solar Cells

    Article • Electronics, June 2014, MDPI AG

    Masahiro Hiramoto

  5. pn-homojunction organic solar cells formed in phase-separated co-deposited films

    Article • Applied Physics Letters, December 2013, American Institute of Physics

    Masahiro Hiramoto

  6. Conjugated organic framework with three-dimensionally ordered stable structure and delocalized π clouds

    Article • Nature Communications, November 2013, Springer Science + Business Media

    Masahiro Hiramoto, Dr. Stephan Irle

  7. Tandem organic solar cells formed in co-deposited films by doping

    Article • Organic Electronics, July 2013, Elsevier

    Masahiro Hiramoto

  8. Improvement of Photovoltaic Characteristics by MoO3 Doping of Thick Hole-Transporting Films

    Article • Japanese Journal of Applied Physics, April 2013, Institute of Physics Publishing

    Masahiro Hiramoto

  9. Double Co-deposited Layered Organic Photovoltaic Cells with Sensitivity from Visible to Near-Infrared Regions

    Article • Japanese Journal of Applied Physics, March 2013, Institute of Physics Publishing

    Masahiro Hiramoto

  10. Evaluation of Barrier Width by Low-Frequency Capacitance Measurements for MoO3-dopedp-Type C60Films

    Article • Molecular Crystals and Liquid Crystals, January 2013, Taylor & Francis

    Masahiro Hiramoto

  11. Effect of Co-evaporant Induced Crystallization on Needle Growth of Phthalocyanine Thin Films

    Article • Molecular Crystals and Liquid Crystals, January 2013, Taylor & Francis

    Masahiro Hiramoto

  12. Junction Formation by Doping in H2Pc:C60Co-Evaporated Films for Solar Cell Application

    Article • Molecular Crystals and Liquid Crystals, January 2013, Taylor & Francis

    Masahiro Hiramoto

  13. Tuning of Barrier Parameters of n-Type Schottky Junctions in Photovoltaic Co-Deposited Films by Doping

    Article • Applied Physics Express, January 2013, Japan Society of Applied Physics

    Masahiro Hiramoto

  14. Tandem photovoltaic cells formed in single fullerene films by impurity doping

    Article • Applied Physics Letters, December 2012, American Institute of Physics

    Masahiro Hiramoto

  15. Invertible Organic Photovoltaic Cells with Heavily Doped Organic/Metal Ohmic Contacts

    Article • Applied Physics Express, September 2012, Institute of Physics Publishing

    Masahiro Hiramoto

  16. pn-control and pn-homojunction formation of metal-free phthalocyanine by doping

    Article • AIP Advances, August 2012, American Institute of Physics

    Masahiro Hiramoto

  17. Organic Photovoltaics

    Article • Molecular Science, January 2012, Japan Society for Molecular Science

    Masahiro Hiramoto

  18. Doping-based control of the energetic structure of photovoltaic co-deposited films

    Article • Applied Physics Letters, September 2011, American Institute of Physics

    Masahiro Hiramoto

  19. pn-homojunction formation in single fullerene films

    Article • AIP Advances, September 2011, American Institute of Physics

    Masahiro Hiramoto

  20. Co‐evaporant Induced Crystalline Donor: Acceptor Blends in Organic Solar Cells

    Article • Advanced Materials, June 2011, Wiley

    Masahiro Hiramoto

  21. Conduction-type control of fullerene films from n- to p-type by molybdenum oxide doping

    Article • Applied Physics Letters, February 2011, American Institute of Physics

    Masahiro Hiramoto

  22. Near infrared light driven organic p-i-n solar cells incorporating phthalocyanine J-aggregate

    Article • Applied Physics Letters, January 2011, American Institute of Physics

    Masahiro Hiramoto

  23. Structural studies of the codeposited i ‐layer of ZnPc:C60p ‐i ‐n solar cells

    Article • physica status solidi c, November 2010, Wiley

    Masahiro Hiramoto

  24. One Month Continuous Operation of Organic p–i–n Solar Cells Covered with a Zinc Oxide Protection Layer

    Article • Applied Physics Express, July 2010, Institute of Physics Publishing

    Masahiro Hiramoto

  25. Development of High Efficient Organic Thin-film Solar Cells

    Article • Journal of the Vacuum Society of Japan, January 2010, The Vacuum Society of Japan

    Masahiro Hiramoto

  26. Morphology of Rare-earth (Y, Sm) Nanostructures Synthesized by the Surfactant-assembled Method

    Article • Chemistry Letters, January 2010, Chemical Society of Japan

    Masahiro Hiramoto

  27. Nanostructure Control by Interlaminated Fullerene/Phthalocyanine Ultrathin Films in p-i-n Organic Solar Cells

    Article • Molecular Crystals and Liquid Crystals, September 2008, Taylor & Francis

    Masahiro Hiramoto

  28. Efficient Organicp-i-nSolar Cells Having Very Thick Codeposited i-Layer Consisting of Highly Purified Organic Semiconductors

    Article • Molecular Crystals and Liquid Crystals, September 2008, Taylor & Francis

    Masahiro Hiramoto

  29. Efficient organic p-i-n solar cells having very thick codeposited i-layer composed of highly purified organic semiconductors

    Article • August 2008, SPIE

    Masahiro Hiramoto

  30. LONG-TERM OPERATION TESTS OF ORGANIC SOLID-STATE SOLAR CELLS

    Article • Surface Review and Letters, August 2007, World Scientific Pub Co Pte Lt

    Masahiro Hiramoto

  31. Formation of Ohmic Contacts to Naphthalene Tetracarboxylic Anhydride Films

    Article • Molecular Crystals and Liquid Crystals, December 2006, Taylor & Francis

    Masahiro Hiramoto

  32. P-I-N Junction Organic Solar Cells

    Article • Molecular Crystals and Liquid Crystals, October 2006, Taylor & Francis

    Masahiro Hiramoto

  33. Formation of Ohmic Contacts to Organic Semiconductor Films

    Article • Molecular Crystals and Liquid Crystals, October 2006, Taylor & Francis

    Masahiro Hiramoto

  34. Design of nanostructures for photoelectric conversion using an organic vertical superlattice

    Article • Applied Physics Letters, May 2006, American Institute of Physics

    Masahiro Hiramoto

  35. Large Area Organic Solar Cells with Thick and Transparent Protection Layers

    Article • Japanese Journal of Applied Physics, April 2006, Japan Society of Applied Physics

    Masahiro Hiramoto

  36. Very-thin-perylene-crystal-based electroluminescent devices

    Article • Applied Physics Letters, February 2006, American Institute of Physics

    Masahiro Hiramoto

  37. Electrical shorting of organic photovoltaic films resulting from metal migration

    Article • Journal of Applied Physics, February 2006, American Institute of Physics

    Masahiro Hiramoto

  38. Organic Solar Cells Incorporating a p-i-n Junction

    Article • Molecular Crystals and Liquid Crystals, February 2006, Taylor & Francis

    Masahiro Hiramoto

  39. Design of nanostructure for photoelectric conversion by vertical organic superlattice

    Article • Electronics and Communications in Japan (Part II Electronics), January 2006, Wiley

    Masahiro Hiramoto

  40. Design of Nanostructure for Organic EL by Vertical Superlattice

    Article • KOBUNSHI RONBUNSHU, January 2006, Society of Polymer Science, Japan

    Masahiro Hiramoto

  41. Formation of ohmic contacts for both holes and electrons to organic semiconductor films

    Article • Applied Physics Letters, April 2005, American Institute of Physics

    Masahiro Hiramoto

  42. Organic Solar Cells Incorporating a p–i–n Junction and a p–n Homojunction

    Article • March 2005, Taylor & Francis

    Masahiro Hiramoto

  43. Three-layered organic solar cells incorporating a nanostructure-optimized phthalocyanine:fullerene codeposited interlayer

    Article • Applied Physics Letters, February 2005, American Institute of Physics

    Masahiro Hiramoto

  44. Organic solar cells protected by very thick naphthalene tetracarboxylic anhydride films

    Article • Applied Physics Letters, December 2004, American Institute of Physics

    Masahiro Hiramoto

  45. Formation of ohmic contacts to perylene molecular crystals

    Article • Applied Physics Letters, September 2004, American Institute of Physics

    Masahiro Hiramoto

  46. Vertical Junction Type Organic Photovoltaic Cells

    Article • Japanese Journal of Applied Physics, July 2004, Japan Society of Applied Physics

    Masahiro Hiramoto

  47. Optical “NOT” Operation in a Light Transducer in which a High-gain Photoresponsive Organic Heterojunction Device is Combined with an Organic Electroluminescent Diode

    Article • Japanese Journal of Applied Physics, July 2004, Japan Society of Applied Physics

    Masahiro Hiramoto

  48. Enhanced Photovoltaic Performance in Fullerene:Phthalocyanine Codeposited Films Deposited on Heated Substrate

    Article • Japanese Journal of Applied Physics, July 2004, Japan Society of Applied Physics

    Masahiro Hiramoto

  49. Crystalline-amorphous organic co-deposited films showing efficient photo-electric conversion

    Article • Molecular Crystals and Liquid Crystals, January 2004, Taylor & Francis

    Masahiro Hiramoto

  50. Influence of Oxygen on Photocurrent Multiplication Phenomenon at Organic/Metal Interface

    Article • Japanese Journal of Applied Physics, April 2003, Japan Society of Applied Physics

    Masahiro Hiramoto

  51. Influence of Oxygen and Water on Photocurrent Multiplication in Organic Semiconductor Films

    Article • Japanese Journal of Applied Physics, February 2003, Japan Society of Applied Physics

    Masahiro Hiramoto

  52. Photocurrent multiplication in organic single crystals

    Article • Applied Physics Letters, August 2002, American Institute of Physics

    Masahiro Hiramoto

  53. High-speed multiplication-type photodetecting device using organic codeposited films

    Article • Applied Physics Letters, August 2002, American Institute of Physics

    Masahiro Hiramoto

  54. Photovoltaic Properties of Ultramicrostructure-Controlled Organic Co-Deposited Films

    Article • Japanese Journal of Applied Physics, April 2002, Japan Society of Applied Physics

    Masahiro Hiramoto

  55. Molecular-Sized Structural Trap at Organic- Metal Interface and Photocurrent Multiplication Phenomenon

    Article • October 2001, Taylor & Francis

    Masahiro Hiramoto

  56. Photocurrent multiplication at organic/metal interface and surface morphology of organic films

    Article • Journal of Applied Physics, April 2000, American Institute of Physics

    Masahiro Hiramoto

  57. Direct measurement of internal potential distribution in organic electroluminescent diodes during operation

    Article • Applied Physics Letters, March 2000, American Institute of Physics

    Masahiro Hiramoto

  58. A high-speed photocurrent multiplication device based on an organic double-layered structure

    Article • Applied Physics Letters, February 2000, American Institute of Physics

    Masahiro Hiramoto

  59. Direct tracing of the photocurrent multiplication process in an organic pigment film

    Article • Journal of Applied Physics, December 1998, American Institute of Physics

    Masahiro Hiramoto

  60. Field-activated structural traps at organic pigment/metal interfaces causing photocurrent multiplication phenomena

    Article • Applied Physics Letters, November 1998, American Institute of Physics

    Masahiro Hiramoto

  61. Photocurrent Multiplication at Organic/Metal Interface and Morphology of Metal Films

    Article • Japanese Journal of Applied Physics, October 1998, Japan Society of Applied Physics

    Masahiro Hiramoto

  62. Photocurrent multiplication phenomenon at organic/organic heterojunction and application to optical computing device combining with organic electroluminescence

    Article • Synthetic Metals, December 1997, Elsevier

    Masahiro Hiramoto

  63. Photocurrent multiplication in naphthalene tetracarboxylic anhydride film at room temperature

    Article • Applied Physics Letters, December 1996, American Institute of Physics

    Masahiro Hiramoto

  64. Patterned Emission in Organic Electroluminescent Device Using Photodecomposition of Polysilane Film by UV Light

    Article • Japanese Journal of Applied Physics, September 1996, Japan Society of Applied Physics

    Masahiro Hiramoto

  65. Photoinduced Hole Injection Multiplication in p-Type Quinacridone Pigment Films

    Article • Japanese Journal of Applied Physics, March 1996, Japan Society of Applied Physics

    Masahiro Hiramoto

  66. Conduction type control from n to p type for organic pigment films purified by reactive sublimation

    Article • Journal of Applied Physics, December 1995, American Institute of Physics

    Masahiro Hiramoto

  67. Fermi Level Shift in Photoconductive Organic Pigment Films Measured by Kelvin Vibrating Capacitor Method

    Article • Japanese Journal of Applied Physics, July 1995, Japan Society of Applied Physics

    Masahiro Hiramoto

  68. Light amplification device using organic electroluminescent diode coupled with photoresponsive organic pigment film

    Article • Applied Physics Letters, May 1995, American Institute of Physics

    Masahiro Hiramoto

  69. Light Amplification in a New Light Transducer Combining an Organic Electroluminescent Diode with Photoresponsive Organic Pigment Film

    Article • Optical Review, November 1994, Springer Science + Business Media

    Masahiro Hiramoto

  70. High photon conversion in a light transducer combining organic electroluminescent diode with photoresponsive organic pigment film

    Article • Applied Physics Letters, May 1994, American Institute of Physics

    Masahiro Hiramoto

  71. Photocurrent multiplication in organic pigment films

    Article • Applied Physics Letters, January 1994, American Institute of Physics

    Masahiro Hiramoto

  72. Photocurrent Multiplication Phenomenon in Organic Pigment Film

    Article • January 1994, Elsevier

    Masahiro Hiramoto

  73. New light transducer using organic electroluminescent diode combined with photoresponsive organic pigment film

    Article • January 1994, Elsevier

    Masahiro Hiramoto

  74. Extrinsic Carrier Photogeneration in Organic Pigments Based on Electric-Field Induced Fluorescence Quenching Measurements.

    Article • Bulletin of the Chemical Society of Japan, January 1994, Chemical Society of Japan

    Masahiro Hiramoto

  75. Directed beam emission from film edge in organic electroluminescent diode

    Article • August 1993, SPIE

    Masahiro Hiramoto

  76. New light transducer using organic electroluminescent diode combined with photoresponsive amorphous silicon carbide

    Article • August 1993, SPIE

    Masahiro Hiramoto

  77. Directed beam emission from film edge in organic electroluminescent diode

    Article • Applied Physics Letters, February 1993, American Institute of Physics

    Masahiro Hiramoto

  78. Organic solar cell based on multistep charge separation system

    Article • Applied Physics Letters, November 1992, American Institute of Physics

    Masahiro Hiramoto

  79. p-i-n like behavior in three-layered organic solar cells having a co-deposited interlayer of pigments

    Article • Journal of Applied Physics, October 1992, American Institute of Physics

    Masahiro Hiramoto

  80. Photomodulation of photocurrent multiplication in a high gain amorphous silicon carbide film

    Article • Applied Physics Letters, March 1992, American Institute of Physics

    Masahiro Hiramoto

  81. Photo-modulation of light up-conversion in light transducer using high-gain photoresponsive amorphous silicon carbide combined with organic electroluminescent diode

    Article • Applied Physics Letters, January 1992, American Institute of Physics

    Masahiro Hiramoto

  82. Photocurrent multiplication in amorphous silicon carbide films

    Article • Applied Physics Letters, October 1991, American Institute of Physics

    Masahiro Hiramoto

  83. Up-conversion of red light to green by a new type of light transducer using organic electroluminescent diode combined with photoresponsive amorphous silicon carbide

    Article • Applied Physics Letters, March 1991, American Institute of Physics

    Masahiro Hiramoto

  84. Three-layered organic solar cell with a photoactive interlayer of codeposited pigments

    Article • Applied Physics Letters, March 1991, American Institute of Physics

    Masahiro Hiramoto

  85. Spatially addressable light transducer using an organic electroluminescent diode combined with amorphous silicon carbide film as an electron photoinjecting electrode

    Article • Applied Physics Letters, October 1990, American Institute of Physics

    Masahiro Hiramoto

  86. Doping effect on the two-layer organic solar cell.

    Article • Chemistry Letters, January 1990, Chemical Society of Japan

    Masahiro Hiramoto

  87. An ultramicrostructured photoelectrode system composed of TiO2 single crystal and layered SiO2 and Pt thin film.

    Article • Chemistry Letters, January 1990, Chemical Society of Japan

    Masahiro Hiramoto

  88. Effect of thin gold interstitial-layer on the photovoltaic properties of tandem organic solar cell.

    Article • Chemistry Letters, January 1990, Chemical Society of Japan

    Masahiro Hiramoto

  89. キナクリドン顔料を用いた有機太陽電池におけるドーピング効果

    Article • KOBUNSHI RONBUNSHU, January 1990, Society of Polymer Science, Japan

    Masahiro Hiramoto

  90. Carbon dioxide reduction at low temperature on various metal electrodes

    Article • Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, March 1989, Elsevier

    Masahiro Hiramoto

  91. Photo-induced electron transfer from adsorbed rhodamine B to oxide semiconductor substrates in vacuo: Semiconductor dependence

    Article • Chemical Physics Letters, July 1988, Elsevier

    Masahiro Hiramoto

  92. Time-resolved measurements of luminescence of ruthenium(II) complexes chemically or physically immobilized on semiconductor or insulator particles in various solvents

    Article • The Journal of Physical Chemistry, November 1987, American Chemical Society (ACS)

    Masahiro Hiramoto

  93. Excited tetraphenylporphine on a silver surface: fluorescence quenching and interference effects

    Article • The Journal of Physical Chemistry, September 1986, American Chemical Society (ACS)

    Masahiro Hiramoto

  94. Visible-light induced water splitting on new semiconductor electrodes made by photolithography.

    Article • Chemistry Letters, January 1986, Chemical Society of Japan

    Masahiro Hiramoto

  95. Metal oxide coated p–n junction silicon electrodes for photoelectrochemical solar energy conversion

    Article • Canadian Journal of Chemistry, July 1985, Canadian Science Publishing

    Masahiro Hiramoto

  96. Hydrogen evolution and iodine reduction on an illuminated n-p junction silicon electrode and its application to efficient solar photoelectrolysis of hydrogen iodide

    Article • The Journal of Physical Chemistry, September 1984, American Chemical Society (ACS)

    Masahiro Hiramoto

  97. p-n Junction silicon electrode coated with noble metal for efficient solar photoelectrolysis of hydrogen iodide.

    Article • Bulletin of the Chemical Society of Japan, January 1984, Chemical Society of Japan

    Masahiro Hiramoto

  98. Photocatalytic and photoelectrochemical reactions of aqueous solutions of formic acid, formaldehyde, and methanol on platinized cadmium sulfide powder and at a cadmium sulfide electrode

    Article • The Journal of Physical Chemistry, January 1984, American Chemical Society (ACS)

    Masahiro Hiramoto