Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications

被引：66
作者：
Choi, Hyunbong [1 ]
Kim, Jeum-Jong [1 ]
Song, Kihyung [2 ]
Ko, Jaejung [1 ]
Nazeeruddin, Md. K. [3 ]
Graetzel, Michael [3 ]
机构：
[1] Korea Univ, Dept Adv Mat Chem, Jochiwon 339700, Chungnam, South Korea
[2] Korea Natl Univ Educ, Dept Chem, Cheongwon 363791, Chungbuk, South Korea
[3] Base Ecole Polytech Fed Lausanne, Fac Sci, LPI, Inst Sci & Ingenierie Chim, CH-1015 Lausanne, Switzerland
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2010年 / 20卷 / 16期
关键词：
NANOCRYSTALLINE TIO2 FILMS; BIS-DIMETHYLFLUORENYL AMINO; EFFICIENT FAR-RED; ORGANIC SENSITIZERS; ENERGY-TRANSFER; CONVERSION EFFICIENCY; ELECTRON-INJECTION; HIGHLY EFFICIENT; ALKYL CHAIN; PHOTOSENSITIZATION;
D O I：
10.1039/b926863d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Three unsymmetrical squaraine dyes JK-64, JK-65, and JK-64Hx, containing a bulky spirobifluorene or hexyloxyphenyl unit are designed and synthesized. These sensitizers, when anchored onto a TiO(2) surface, exhibit decreased aggregation as well as enhanced unidirectional flow of electrons. Under standard global AM 1.5 solar conditions, an optimized JK-64Hx sensitized cell gave a short-circuit photocurrent density (J(sc)) of 12.82 mA cm(-2), an open-circuit voltage (V(oc)) of 0.54 V and a fill factor (ff) of 0.75, corresponding to an overall conversion efficiency (eta) of 5.20%.
引用
收藏
页码：3280 / 3286
页数：7
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