物理化学学报 >> 2016, Vol. 32 >> Issue (8): 1880-1893.doi: 10.3866/PKU.WHXB201606061

综述 上一篇    下一篇

单重态激子裂分的研究进展

刘艳苹1,2,吴义室1,*(),付红兵1,3,*()   

  1. 1 中国科学院化学研究所,分子动态与稳态结构国家重点实验室,北京100190
    2 中国科学院大学,北京100049
    3 首都师范大学化学系,北京100048
  • 收稿日期:2016-05-05 发布日期:2016-07-29
  • 通讯作者: 吴义室,付红兵 E-mail:yswu@iccas.ac.cn;hongbing.fu@iccas.ac.cn
  • 作者简介:刘艳苹,1991年生。中国科学院化学研究所,硕士研究生。主要研究方向为基于有机光功能材料激子裂分的研究。参与了国家自然科学基金和国家重点基础研究发展规划项目课题研究|吴义室,1977年生。获得中国科学院化学研究所理学博士学位。现为中国科学院化学研究所副研究员。主要从事有机光电功能材料中光诱导动力学的相关研究,为新型有机半导体材料的研究提供实验依据和理论指导|付红兵,1971年生。中国科学院化学研究所,研究员,博士生导师。研究领域:分子聚集及组装体系的光化学与光物理,纳米尺度下的超快光诱导动力学过程,基于有机半导体低维晶体的新型光电器件
  • 基金资助:
    国家自然科学基金(21573251);国家自然科学基金(21521062);国家自然科学基金(21190034);国家自然科学基金(21221002);国家重点基础研究发展规划项目(973)(2011CB808402);国家重点基础研究发展规划项目(973)(2013CB933500)

Recent Progress in Singlet Exciton Fission

Yan-Ping LIU1,2,Yi-Shi WU1,*(),Hong-Bing FU1,3,*()   

  1. 1 State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
    2 University of Chinese Academy of Sciences, Beijing 100049, P. R. China
    3 Department of Chemistry, Capital Normal University, Beijing 100048, P. R. China
  • Received:2016-05-05 Published:2016-07-29
  • Contact: Yi-Shi WU,Hong-Bing FU E-mail:yswu@iccas.ac.cn;hongbing.fu@iccas.ac.cn
  • Supported by:
    The project was supported by the National Natural Science Foundation of China(21573251);The project was supported by the National Natural Science Foundation of China(21521062);The project was supported by the National Natural Science Foundation of China(21190034);The project was supported by the National Natural Science Foundation of China(21221002);National Key Basic Research Program of China (973)(2011CB808402);National Key Basic Research Program of China (973)(2013CB933500)

摘要:

单重态激子裂分指的是在有机分子中一个单重态激子与相邻的基态发色团相互作用形成两个三重态激子的过程。利用这种多激子效应制成的光伏器件有望突破肖克利-奎瑟限制,使光电转换的理论效率由30%提高到44.4%。近年来各国科学家在裂分材料的设计合成和器件化应用方面取得了一定的进展,但是对于激子裂分物理本质的认知仍然存在争议和分歧。本文较为系统地介绍了激子裂分材料的最新进展和本研究组的相关工作。简要回顾了激子裂分的发展历史,从概念、裂分的发生条件和作用机制三方面介绍了激子裂分过程,综述了具有分子间和分子内裂分性质的材料的最新研究成果。在系统归纳激子裂分研究现状的基础上对单重态激子裂分的发展趋势和应用探索指出了可能的方向。

关键词: 有机太阳能电池, 光能转化, 光物理, 分子间和分子内

Abstract:

Singlet exciton fission is the process by which a high-energy singlet exciton splits into two low-energy triplet excitons. Organic solar cells based on singlet fission have the potential to exceed the Shockley-Queisser limit and, in doing so, may improve their efficiency from 30% to 44.4%. Although progress in singlet fission materials and photovoltaic devices has accelerated with recent research, many challenges and debates remain with regard to clarifying the relationship between molecule structures and the rate and efficiency of singlet fission. This review addresses recent advances in singlet fission materials and summarizes the work of our own research group. We begin by introducing the background of singlet fission, following with the general concept, the requirements for singlet fission to proceed, and the applications of transient absorption spectroscopy. Two mechanisms have been proposed to explain singlet fission molecules, intermolecular and intramolecular singlet fission, and these two types of materials are summarized, focusing on dimers, which are novel structures that undergo efficient intramolecular singlet fission. Based on the latest developments in singlet fission, we discuss the possible future advances in, and prospects for the application of, singlet fission materials.

Key words: Organic solar cell, Photon conversion, Photophysics, Intermolecule and intramolecule

MSC2000: 

  • O644