Energy spectroscopy of electrons in conduction band of solar cell materials based on quantum structure

2013 Fiscal Year Final Research Report

• Project/Area Number: 25600088
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Crystal engineering
• Research Institution: Nagoya University
• Principal Investigator: UJIHARA Toru 名古屋大学, 工学(系)研究科(研究院), 教授 (60312641)
• Project Period (FY): 2013-04-01 – 2014-03-31
• Keywords: 高効率太陽光発電材料・素 子

Research Abstract

In intermediate-band solar cells, electrons are efficiently excited via the intermediate band by using low energy photons to achieve high conversion efficiency. Mini-bands due to superlattice is a candidate of the intermediate-band. In this study, we measured the energy spectra of electrons excited by visible-light in the mini-bands of superlattice solar cells. Firstly we established the equipment that consists of angle-resolved photo-emission electron spectroscopy, NEA preparation chamber and Ti-Sapphire laser. Next, we successfully measured the energy dispersion of the mini-bands due to superlattice structure.

Research Products

• [Presentation] 可視光励起光電子分光法による半導体中の伝導電子の直接観察 (2014)
  • Author(s): 市橋史朗, 志村大樹, 西谷健治, 原真, 伊藤孝寛, 原田俊太, 田川美穂, 宇治原徹
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学湘南キャンパス
  • Year and Date: 2014-03-27
• [Presentation] 可視光励起光電子分光法による半導体超格子ミニバンド構造の有効質量評価 (2014)
  • Author(s): 西谷健治, 志村大樹, 市橋史朗 , 桒原真人, 伊藤孝寛, 原田俊太, 田川美穂, 宇治原徹
  • Organizer: 2014年第61回応用物理学会春季学術講演会
  • Place of Presentation: 青山学院大学相模原キャンパス
  • Year and Date: 2014-03-19
• [Presentation] Evaluation of Mini-Bands Formed in Superlattice Structure for Intermediate-Band Solar Cell (2013)
  • Author(s): D. Shimura, F. Ichihashi, K. Nishitani, S. Harada, T. Ito, M. Kuwahara, M. Matsunami, S. Kimura, M. Tagawa, T. Ujihara
  • Organizer: ISETS '13
  • Place of Presentation: Nagoya University, Nagoya
  • Year and Date: 2013-12-14
• [Presentation] Direct Observation of Conduction Band Structure and Conduction Electron Distribution in Semiconductor for Intermediate-band Solar Cells (2013)
  • Author(s): F. Ichihashi, D. Shimura, K. Nishitani, M. Kuwahara, S. Harada, T. Ito, M. Tagawa, T. Ujihara
  • Organizer: ISETS '13
  • Place of Presentation: Nagoya University, Nagoya
  • Year and Date: 2013-12-14
• [Presentation] Observation of Conduction Electrons in Superlattice Structure by Visible Light Photoemission Spectroscopy (2013)
  • Author(s): K. Nishitani, F. Ichihashi, D. Shimura, S. Harada, M. Kuwahara, M. Tagawa, T. Ito, T. Ujihara
  • Organizer: the 23rd International Photovoltaic Science and Engineering Conference(PVSEC-23)
  • Place of Presentation: Taipei International Conventional Center, Taipei, Taiwan
  • Year and Date: 2013-10-30
• [Presentation] 「講演奨励賞受賞記念講演」可視光励起光電子分光法による伝導電子の直接観察 (2013)
  • Author(s): 市橋史朗 , 志村大樹, 西谷健治, 桒原真人, 伊藤孝寛, 原田俊太, 田川美穂, 宇治原徹
  • Organizer: 2013年第74回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学
  • Year and Date: 2013-09-17
  • Invited
• [Presentation] 可視光励起光電子分光法による半導体超格子構造の伝導キャリア観察 (2013)
  • Author(s): 西谷健治, 市橋史朗 , 志村大樹, 桒原真人, 伊藤孝寛, 原田俊太, 田川美穂, 宇治原徹
  • Organizer: 2013年第74回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学
  • Year and Date: 2013-09-17
• [Presentation] 角度分解光電子分光法を用いた半導体超格子のミニバンド評価 (2013)
  • Author(s): 志村大樹, 市橋史朗 , 西谷健治, 原田俊太, 伊藤孝寛, 桒原真人, 松波雅治, 木村真一, 田川美穂, 宇治原徹
  • Organizer: 2013年第74回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学
  • Year and Date: 2013-09-17