Aung Su Htike, Hao Yan, Oo Than Zaw, Boschloo Gerrit
Department of Chemistry-Ångström Laboratory, Uppsala University, P.O. Box 523, 75120 Uppsala, Sweden.
Department of Physics, Materials Sciences Research Laboratory, University of Mandalay, Mahaaungmyay township (100103), Mandalay, Myanmar.
ACS Omega. 2017 May 5;2(5):1820-1825. doi: 10.1021/acsomega.7b00267. eCollection 2017 May 31.
The effect of chemical modification of mesoporous TiO electrodes by 2-(4-butoxyphenyl)--hydroxyacetamide (BPHA) before dye adsorption is investigated in dye-sensitized solar cells (DSCs). Two organic dyes, LEG4 and Dyenamo blue, were used in combination with the cobalt (II/III) tris(bipyridine) redox couple. The photovoltaic performance of the DSCs is clearly enhanced by BPHA. Preadsorption of mesoporous TiO electrodes with BPHA lowered the amount of adsorbed dye but improved the short-circuit current densities and the power conversion efficiencies by 10-20%, while keeping the open-circuit potential essentially unaffected. Notably, BPHA improved the LEG4 performance, whereas it has been reported for this dye that chenodeoxycholic acid as a coadsorbent lowers solar cell efficiency. Faster dye regeneration was found to be one reason for improved performance, but improved electron injection efficiency may also contribute to the favorable effect of BPHA.
在染料敏化太阳能电池（DSC）中，研究了在染料吸附之前用2 -（4 - 丁氧基苯基）-α-羟基乙酰胺（BPHA）对介孔TiO₂电极进行化学修饰的效果。两种有机染料LEG4和Dyenamo蓝与钴（II/III）三（联吡啶）氧化还原对结合使用。BPHA显著提高了DSC的光伏性能。用BPHA预吸附介孔TiO₂电极降低了染料的吸附量，但短路电流密度和功率转换效率提高了10 - 20%，同时开路电位基本不受影响。值得注意的是，BPHA改善了LEG4的性能，而据报道，对于这种染料，鹅去氧胆酸作为共吸附剂会降低太阳能电池效率。发现更快的染料再生是性能提高的一个原因，但电子注入效率的提高也可能有助于BPHA产生良好效果。
