Impact of hydroxy and octyloxy substituents of phenothiazine based dyes on the photovoltaic performance
Impact of hydroxy and octyloxy substituents of phenothiazine based dyes on the photovoltaic performance
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吩噻嗪基染料的羟基和辛氧基取代基对光伏性能的影响
DOI：
10.1016/j.dyepig.2013.05.032
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发表时间：
2013-11-01
影响因子：
4.5
通讯作者：
Cao, Derong
中科院分区：
文献类型：
--
作者：
Iqbal, Zafar;Wu, Wu-Qiang;Cao, Derong
合成了两种新型吩噻嗪类有机染料，研究了它们对光电性能的影响。羟基与羧基一起作为辅助锚定单元沿着，而吩噻嗪修饰部分作为电子供体。光物理和电化学研究表明，在溶液中的染料与羟基的最大吸收蓝移，其带隙增加，表明供体受体强度降低相比，辛氧基取代的染料。此外，具有羟基部分的有机染料的电子寿命较短，这是由于电子复合的阻力较小。具有辛氧基基团的染料具有更高的电子寿命和开路光电压，导致在标准AM 1.5G照明下的总功率转换效率为6.32%。在450 ~ 500 nm范围内，IPCE值大于80%。(C)2013爱思唯尔有限公司保留所有权利。
Two novel organic dyes containing hydroxy and octyloxy substituents onto a phenothiazine skeleton were synthesized and their effects on the photovoltaic performance were studied. Hydroxy acts as an ancillary anchoring unit along with the carboxylic group, while the phenothiazine modified moiety acts as an electron donor. The photophysical and electrochemical studies revealed that maximum absorbance of the dye with the hydroxy group in the solution was blue shifted and its band gap increased, indicating that donor acceptor strength was reduced as compared to the octyloxy substituted dye. Furthermore, electron lifetime of the organic dye with the hydroxy moiety was shorter due to smaller resistance of electron recombination. Contrarily the dye with octyloxy moiety exhibited higher electron lifetime and open-circuit photovoltage leading to an overall power conversion efficiency of 6.32% under standard AM 1.5G illumination. The IPCE was over 80% in the region between 450 and 500 nm. (C) 2013 Elsevier Ltd. All rights reserved.