Photoelectrochemical Characterization of Nanocrystalline Thin-Film Cu2ZnSnS4 Photocathodes

被引：100
作者：
Riha, Shannon C. [1 ]
Fredrick, Sarah J. [1 ]
Sambur, Justin B. [1 ]
Liu, Yuejiao [2 ,3 ]
Prieto, Amy L. [1 ]
Parkinson, B. A. [2 ,3 ]
机构：
[1] Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA
[2] Univ Wyoming, Dept Chem, Laramie, WY 82071 USA
[3] Univ Wyoming, Sch Energy Resources, Laramie, WY 82071 USA
来源：
ACS APPLIED MATERIALS & INTERFACES | 2011年 / 3卷 / 01期
关键词：
Cu2ZnSnS4; thin films; solar cells; photoelectrochemistry; nano ink; SENSITIZED SOLAR-CELLS; TIO2 COMPACT LAYER; ELECTRICAL-PROPERTIES; CDSE NANOCRYSTALS; PHOTOVOLTAICS; CUINSE2; PRECURSORS; ABSORBER; SHAPE; GEL;
D O I：
10.1021/am1008584
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Cu2ZnSnS4 (CZTS) nanocrystals, synthesized by a hot injection solution method, have been fabricated into thin films by dip-casting onto fluorine doped tin oxide (FTO) sustrates. The photoresponse of the CZTS nanocrystal films was evaluted using absorbance measurements along with photelectrochemical methods in aqueous electrolytes, Photoelectochemcial characterization revealed a p-type photoresponse when the films were illuminated in an aqueous Eu3+ redox electrolyte. The effects of CZTS stochiometry, film thickness, and low-temperature annealing on the photocurrents from front and back illuminations suggests that the minority carrier diffusion and recombination at the back contact (Via reaction of photogenerated hose with Eu2+ produced from photoreduction by minority carriers) are the main loss mechanisms in the cell. Low-temperature annealing resulted in significant increases in the photocurrents for films made from both Zn-rich and stoichiometric CZTS nanocrystals.
引用
收藏
页码：58 / 66
页数：9
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