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首页> 外文期刊>Japanese journal of applied physics >Formation of relaxed charge-transfer excitons in donor-acceptor-type polymer solar cells
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Formation of relaxed charge-transfer excitons in donor-acceptor-type polymer solar cells

机译：供体-受体型聚合物太阳能电池中弛豫电荷转移激子的形成

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摘要

The formation of relaxed charge-transfer (CT) excitons and its effect on photocarrier generation in a series of donor-acceptor (DA)-type polymers were examined with a focus on the two unique absorption bands that originate from low-energy charge-transfer (CT) and high-energy main-chain (MC) excitations, respectively. The photoluminescence in response to the CT excitation demonstrated Stokes shift, which is a clear evidence of the formation of bound CT excitons associated with a strong lattice relaxation. Results indicate that photocarriers are generated indirectly by CT excitation through the formation of bound electron-hole pairs, the binding energy and lifetime of which correlate with the donor-acceptor CT degree in the DA-type polymers.
机译：考察了一系列供体-受体（DA）型聚合物中弛豫电荷转移（CT）激子的形成及其对光载流子产生的影响，重点研究了源自低能电荷转移的两个独特吸收带（CT）和高能主链（MC）激发。响应CT激发的光致发光显示出斯托克斯位移，这清楚地证明了结合的CT激子的形成与强晶格弛豫有关。结果表明，通过结合束缚的电子-空穴对的形成，CT激发间接产生了光载流子，其结合能和寿命与DA型聚合物中的供体-受体CT程度相关。

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  • 来源
    《Japanese journal of applied physics》 |2014年第5s3期|05HB12.1-05HB12.5|共5页
  • 作者

    Junya Tsutsumi; Hiroyuki Matsuzaki; Naoyuki Kanai; Toshikazu Yamada; Tatsuo Hasegawa;

  • 作者单位

    National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8562, Japan;

    National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8562, Japan;

    Fuji Electric Co., Ltd., Hino, Tokyo 191-8502, Japan;

    National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8562, Japan;

    National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8562, Japan,Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan;

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