Experimental and theoretical analysis of organic dyes having a double D-π-A configurations for dye-sensitized solar cells

被引：4

作者：

Balanay, Mannix P. ^{[1
,2
]}

Choi, Kyu-Seok ^{[1
]}

Lee, Sang Hee ^{[1
]}

Kim, Dong Hee ^{[1
]}

机构：

[1] Kunsan Natl Univ, Dept Chem, Gunsan 573701, South Korea

[2] Nazarbayev Univ, Dept Chem, Astana 010000, Kazakhstan

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2017年 / 173卷

基金：

新加坡国家研究基金会;

关键词：

Triphenylamine; Di-anchoring dye; Thiophene bridging; Suppression of aggregation; Density functional theory; MOLECULES; ENERGIES;

D O I：

10.1016/j.saa.2016.09.020

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Two spiro-like organic dyes linked at the thiophene bridge (KS-11 and KS-12) together with the original rod shaped D-pi-A configuration (C1) were designed, synthesized, and characterized based on their electronic structure, and determine the photophysical and photovoltaic properties for its application in dye-sensitized solar cells. Compared to Cl, the double D-pi-A spiro-like configuration, which consists of two separated light-harvesting moieties, was found to be beneficial to photocurrent generation provided that they are separated properly to prevent intramolecular exciton annihilation. This was observed when KS-11, which is linked at the beta-position of the thiophene moiety of D-pi-A, was compared with KS-12, where the two D-pi-A are linked with an additional thiophene using a alpha-beta linkage. The results show that KS-12 produced a 20% and 17% increase in photovoltaic efficiency under simulated AM 1.5G solar irradiation compared to MS-11 and C1, respectively. This increase in photovoltaic performance is credited mostly to the reduction of recombination effects and the increase in the density of states at the semiconductor surface due to high dye loading and better charge-transfer properties. (C) 2016 Published by Elsevier B.V.

引用

页码：361 / 368

页数：8

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