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首页> 外文期刊>Applied physics express >Two-step photocurrent generation enhanced by the fundamental-state miniband formation in intermediate-band solar cells using a highly homogeneous InAs/GaAs quantum-dot superlattice
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Two-step photocurrent generation enhanced by the fundamental-state miniband formation in intermediate-band solar cells using a highly homogeneous InAs/GaAs quantum-dot superlattice

机译:通过使用高度均匀的InAs / GaAs量子点超晶格在中带太阳能电池中形成基态微带增强了两步光电流生成

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摘要

We studied intermediate-band solar cells (IBSCs) incorporating highly homogeneous InAs/GaAs quantum dot superlattices (QDSLs). The extra photocurrent generated by two-step photon absorption markedly increases at the fundamental state (FS) because the FS miniband has been successfully formed in the QDSL-IBSC by controlling the QD size homogeneity. Here, the carriers excited into the miniband spatially separate in the internal electric field, and the long-lived electrons in the intermediate states of the miniband increase the inter-subband absorption strength. The two-step photocurrent response, therefore, extends toward the longer-wavelength side corresponding to the QDSL-FS at approximately 1.2 mu m. (C) 2018 The Japan Society of Applied Physics
机译:我们研究了结合了高度均匀的InAs / GaAs量子点超晶格(QDSL)的中频太阳能电池(IBSC)。由于已经通过控制QD尺寸均匀性在QDSL-IBSC中成功形成了FS微型频带,因此在基态(FS)处,由两步光子吸收产生的额外光电流显着增加。在此,激发到微带中的载流子在内部电场中在空间上分开,并且处于微带中间状态的长寿命电子提高了子带间吸收强度。因此,两步光电流响应朝着对应于QDSL-FS的大约1.2微米的较长波长侧延伸。 (C)2018日本应用物理学会

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  • 来源
    《Applied physics express》 |2018年第1期|012301.1-012301.4|共4页
  • 作者单位

    Kobe Univ, Grad Sch Engn, Dept Elect & Elect Engn, Kobe, Hyogo 6578501, Japan;

    Kobe Univ, Grad Sch Engn, Dept Elect & Elect Engn, Kobe, Hyogo 6578501, Japan;

    Kobe Univ, Grad Sch Engn, Dept Elect & Elect Engn, Kobe, Hyogo 6578501, Japan;

    Kobe Univ, Grad Sch Engn, Dept Elect & Elect Engn, Kobe, Hyogo 6578501, Japan;

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