Co-sensitization of amphiphilic ruthenium (II) sensitizer with a metal free organic dye: Improved photovoltaic performance of dye sensitized solar cells

被引：43
|
作者：
Singh, Surya Prakash [1 ]
Chandrasekharam, M. [1 ]
Gupta, Kankatala S. V. [1 ]
Islam, Ashraful [2 ]
Han, Liyuan [2 ]
Sharma, G. D. [3 ]
机构：
[1] CSIR Indian Inst Chem Technol, Inorgan & Phys Chem Div, Hyderabad 500007, Andhra Pradesh, India
[2] Natl Inst Mat Sci, Photovolta Mat Unit, Tsukuba, Ibaraki 3050047, Japan
[3] Jaipur Engn Coll, R&D Ctr Engn & Sci, Jaipur 303101, Rajasthan, India
来源：
ORGANIC ELECTRONICS | 2013年 / 14卷 / 05期
关键词：
Co-sensitization; Metal-free dye; Ru dye; Dye-sensitized solar cell; Efficiency; THIOCYANATE-FREE; REDOX ELECTROLYTE; EFFICIENCY; TIO2; BIPYRIDINE; CONVERSION;
D O I：
10.1016/j.orgel.2012.12.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A co-sensitization approach has been evaluated for achieving enhanced performance in dye sensitized solar cells wherein an amphiphilic ruthenium (II) sensitizer (Ru) is co-sensitized with a simple donor-pi-conjugated-acceptor (D-pi-A) type metal free alkoxy substituted organic dye (Y3). When compared to the devices fabricated from individual sensitizers, the co-sensitized device (Ru + Y3) showed significantly enhanced J(sc) value. Upon optimization, the device made of Ru + Y3 system yielded J(sc) = 14.32 mA/cm(2), V-oc = 0.602 V, ff = 0.73 and power conversion efficiency (PCE) = 6.29%. This performance is superior to that of either of the individual DSSCs sensitized with Ru (PCE = 5.21%) and Y3 (PCE = 3.30%) under similar fabrication and evaluation conditions. The enhanced PCE has been attributed to the fact that the co-adsorbent effectively overcome the competitive light absorption by I-/I-3(-), avoid dye aggregation, and reduce the charge recombination. (C) 2012 Elsevier B. V. All rights reserved.
引用
收藏
页码：1237 / 1241
页数：5
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