@article{oai:miyazaki-u.repo.nii.ac.jp:00005867,
 author = {岩永, 凌平 and Iwanaga, Ryohei and 中村, 翼 and Nakamura, Tsubasa and 渡部, 愛理 and Watanabe, Airi and 安藝, 翼 and Aki, Tsubasa and 杉山, 正和 and Sugiyama, Masakazu and Ikari, Tetsuo and 碇, 哲雄 and Fukuyama, Atsuhiko and 福山, 敦彦 and 岩永, 凌平 and Iwanaga, Ryohei and 渡部, 愛理 and Watanabe, Airi and 安藝, 翼 and Aki, Tsubasa and 杉山, 正和 and Sugiyama, Masakazu},
 journal = {宮崎大学工学部紀要, Memoirs of Faculty of Engineering, University of Miyazaki},
 month = {Jul},
 note = {We investigated the carrier transport properties in superlattice (SL) embedded p-i-n GaAs solar cells by using Piezoelectric Photo-Thermal (PPT) spectroscopy that detected the non-radiative recombination of photo-excited carriers. Two samples with different SL were prepared. One was InGaAs/GaAsP SL and other was GaAs-interlayer inserted SL to relax the strain caused by the lattice mismatch. From the comparison with the theoretical calculation, we concluded that observed distinctive peaks below the band gap of GaAs substrate were due to the optical transition from the first quantum level of heavy hole to the first quantum level of electron (e1-hh1). The temperature dependence of their PPT signal intensities was well explained by the carrier relaxation models consisting of four processes: radiative and non-radiative recombination in SL, thermal escape to the barrier layer (ES process), and tunneling through miniband after thermal excitation from the lower to the upper levels (TATE process). The activation energy ΔETATE for the interlayer sample was 0.144 eV, this was smaller than the activation energy ΔEES of 0.259 eV for the barrier-2.0-nm sample. Moreover, the TATE process was also found to be dominant in all processes at 300 K from the calculation of the relevant lifetimes. As a result, the insertion of an interlayer resulted in the SL embedded solar cells with a higher efficiency than conventional multiple quantum well embedded solar cells.},
 pages = {45--49},
 title = {非発光再結合検出による歪緩和層挿入超格子構造太陽電池のキャリア輸送評価},
 volume = {48},
 year = {2019},
 yomi = {イワナガ, リョウヘイ and ナカムラ, ツバサ and ワタナベ, アイリ and アキ, ツバサ and スギヤマ, マサカズ and イカリ, テツオ and フクヤマ, アツヒコ and イワナガ, リョウヘイ and ワタナベ, アイリ and アキ, ツバサ and スギヤマ, マサカズ}
}