High-Performance Organic Materials for Dye-Sensitized Solar Cells: Triarylene-Linked Dyads with a 4-tert-Butylphenylamine Donor
作者:Yuan Jay Chang、Po-Ting Chou、Szu-Yu Lin、Motonori Watanabe、Zhi-Qian Liu、Ju-Ling Lin、Kew-Yu Chen、Shih-Sheng Sun、Ching-Yang Liu、Tahsin J. Chow
DOI:10.1002/asia.201100777
日期:2012.3.5
A series of organic dyes were prepared that displayed remarkable solar‐to‐energy conversion efficiencies in dye‐sensitized solar cells (DSSCs). These dyes are composed of a 4‐tert‐butylphenylamine donor group (D), a cyanoacrylic‐acid acceptor group (A), and a phenylene‐thiophene‐phenylene (PSP) spacer group, forming a D‐π‐A system. A dye containing a bulky tert‐butylphenylene‐substituted carbazole
制备了一系列有机染料,它们在染料敏化太阳能电池(DSSC)中表现出卓越的太阳能转化效率。这些染料由4-叔丁基苯胺供体基团(D),氰基丙烯酸受体基团(A)和亚苯基-噻吩-亚苯基(PSP)间隔基组成,形成一个D-π-A系统。含有庞大的叔丁基亚苯基取代的咔唑(CB)供体基团的染料表现出最高的性能,总转化效率为6.70%。该装置的性能与供体基团的结构特征有关。也就是叔叔的存在丁基不仅可以增强供体的电子给体能力,而且还可以抑制分子间的聚集。用CB-PSP染料制成的典型设备在400-480 nm范围内提供80%的最大光子-电流转换效率(IPCE),短路光电流密度J sc = 14.63 mA cm -2,开路光电压V oc = 0.685 V,填充系数FF = 0.67。当鹅去氧胆酸(CDCA)用作共吸收剂时,CB-PSP的开路电压显着升高,但总体性能下降了16-18%。该结果表明存在4叔‐丁基苯基取