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首页> 外文期刊>Solar Energy >Photovoltaic-targeted photoluminescence lifetime engineering in bright type-Ⅱ alloy quantum dots
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Photovoltaic-targeted photoluminescence lifetime engineering in bright type-Ⅱ alloy quantum dots

机译：明亮的Ⅱ型合金量子点中的光伏靶向光致发光寿命工程

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摘要

A crucial issue faced by quantum dot solar cells (QDSC) is how to achieve a quantum dot material with high photoluminescence (PL) quantum yield and long excited state lifetime at the same time to maximize charge carrier collection efficiency. Here, we present a new type of Zn0.9Cd0.1S/ZnSe hetero-nanocrystals that have a staggered band alignment, i.e., a type-II structure by which the wave function overlap between electrons and holes is reduced, thereby leading to a significant enhancement in the PL lifetime. The resultant QD also exhibits a QY up to 75.4%, which is, to the best of our knowledge, the highest one for a type-II QD to date. In particular, we explore the underlying relationship between the broad tenability and energy level alignment of these heteronanocrystals, and we highlight the properties that have delivered QDSCs and light-emitting diodes.
机译：量子点太阳能电池（QDSC）面临的一个关键问题是如何同时获得具有高光致发光（PL）量子产率和长激发态寿命的量子点材料，以最大程度地提高载流子收集效率。在这里，我们提出了一种新型的Zn0.9Cd0.1S / ZnSe杂纳米晶体，其具有交错的能带排列，即II型结构，通过该结构，电子和空穴之间的波函数重叠减少，从而导致延长PL寿命。最终的QD还显示出高达75.4％的QY，据我们所知，这是迄今为止II型QD的最高值。特别是，我们探索了这些异质纳米晶体的宽延性与能级排列之间的潜在关系，并重点介绍了已交付QDSC和发光二极管的特性。

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  • 来源
    《Solar Energy》 |2018年第7期|75-83|共9页
  • 作者

    Li Qinghua; Jin Xiao; Yang Yin; Chen Zihan; Kong Degui; Nie Chao; Li Haiyang; Song Yinglin;

  • 作者单位

    Lingnan Normal Univ, Sch Phys Sci & Technol, Zhanjiang 524048, Peoples R China;

    Lingnan Normal Univ, Sch Phys Sci & Technol, Zhanjiang 524048, Peoples R China;

    Nanchang Hangkong Univ, Jiangxi Engn Lab Optoelect Testing Technol, Nanchang 330063, Jiangxi, Peoples R China;

    Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia;

    Heilongjiang Univ, Coll Elect Engn, Harbin 150080, Heilongjiang, Peoples R China;

    Nanchang Hangkong Univ, Jiangxi Engn Lab Optoelect Testing Technol, Nanchang 330063, Jiangxi, Peoples R China;

    Nanchang Hangkong Univ, Jiangxi Engn Lab Optoelect Testing Technol, Nanchang 330063, Jiangxi, Peoples R China;

    Harbin Inst Technol, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Type-II quantum dots; Charge transport; Quantum dot solar cells; Excited state lifetime;

    机译：II型量子点;电荷传输;量子点太阳能电池;激发态寿命;

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