@article{oai:miyazaki-u.repo.nii.ac.jp:00005207,
 author = {武田, 秀明 and Takeda, Hideaki and 中村, 翼 and Nakamura, Tsubasa and 魯, 家男 and Lu, Jianan and 杉山, 正和 and Sugiyama, Masakazu and Ikari, Tetsuo and 碇, 哲雄 and Fukuyama, Atsuhiko and 福山, 敦彦 and K, Toprasertpong and 武田, 秀明 and Takeda, Hideaki and 魯, 家男 and Lu, Jianan and Toprasertpong, Kasidit 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 carrier transport properties in three types of strain-balanced InGaAs/GaAsP quantum well solar cells by using the surface photovoltage (SPV) spectroscopy. First absorbing layer was multiple quantum well (MQW) and second was super-lattice (SL). Last one was GaAs-interlayer-inserted SL structure to relax the strain caused by the lattice mismatch. Distinct SPV signals were observed below the GaAs bandgap energy for all samples. In addition, the SPV signal intensities of SL and GaAs-interlayer samples were larger than that of MQW sample. From the computational calculation by using 3-D nano device simulator, the 1st quantum level of electron (e1) in SL sample and 2nd quantum level of electron (e2) and 1st quantum level of light hole (lh1) in GaAs-interlayer sample were found to form minibands because of the overlapping of wave functions. In these case, carriers can transport by tunneling through minibands without recombination. Since the SPV detects the surface potential change caused by carrier collection, large SPV signals obtained for SL and GaAs-interlayer samples represented that the carrier transport properties were improved by the formation of miniband. On the other hand, the SPV spectrum of SL sample showed two distinctive peaks corresponding to the mini-Brillouin zone center and edge of e2-miniband. The usefulness of SPV for investigating the carrier transport properties in quantum well solar cells was clearly demonstrated.},
 pages = {89--94},
 title = {SPV 法を用いた GaAs 歪緩和層挿入 InGaAs/GaAsP系量子井戸太陽電池のキャリア輸送評価},
 volume = {46},
 year = {2017},
 yomi = {タケダ, ヒデアキ and ナカムラ, 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 タケダ, ヒデアキ and スギヤマ, マサカズ}
}