D-A-π-A Featured sensitizers for organic solar cells with improved spectral response and stability

doi:10.11949/j.issn.0438-1157.20151026

Abstract

Abstract:

Organic functional dyes have been widely exploited in optoelectronic fields. As a key element in dye-sensitized solar cells (DSSCs), their light-responsive spectral characters and long-term stability are the key issues on their practical applications. Generally, many traditional organic sensitizers are derived from the common concept of electron donor-π bridge-electron acceptor (D-π-A). Due to the finite donors and acceptors, the D-π-A model always exhibits limitation to the spectral response, photovoltaic efficiency and enduring stability. Recently, a novel D-A-π-A model via inserting an additional electron acceptor unit into the π bridge was proposed, allowing the convenient modulations in energy levels and light-harvesting. In this paper, the spectral modulation and stability enhancement based on D-A-π-A motif organic sensitizers were introduced.

Key words: organic sensitizers, solar cells, electron acceptor, light-response, photo-stability

摘要：

有机功能染料在新型光电子领域具有重要的应用前景,染料的光学特性与稳定性是影响其应用价值的重要因素。应用于有机太阳电池的敏化染料是决定电池器件光电转换效率和长期稳定性的关键组分。传统有机敏化染料的设计主要遵循电子给体-共轭桥连-电子受体(D-π-A)模型,但其对设计宽光谱、高效率、高稳定性的有机敏化染料存在明显的局限性。近年来系统引入额外的强吸电子基团作为电荷分离“阱”受体,成功发展高稳定性敏化染料,显著提升敏化染料稳定性及光电转换效率,创新地提出D-A-π-A型纯有机敏化染料概念。本文主要依据在纯有机敏化染料设计与合成方面的相关工作,简单介绍D-A-π-A模型中额外受体对染料能级、光谱等性能的调控机制,以及该模型对提升有机敏化染料稳定性方面的作用及原理。

关键词: 有机敏化染料, 太阳电池, 电子受体, 光谱响应, 光稳定性

CLC Number:

TQ028.8

WU Yongzhen, ZHANG Weiwei, ZHU Weihong. D-A-π-A Featured sensitizers for organic solar cells with improved spectral response and stability[J]. CIESC Journal, 2016, 67(1): 231-239.

吴永真, 张维伟, 朱为宏. D-A-π-A型有机敏化染料的光谱调控与稳定性提升[J]. 化工学报, 2016, 67(1): 231-239.

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