Performance of Nanocrystalline Iron Pyrite as the Back Contact to CdS/CdTe Solar Cells

被引：0

作者：

Bhandari, Khagendra P. ^{[1
]}

Khanal, Rajendra R. ^{[1
]}

Paudel, Naba R. ^{[1
]}

Koirala, Prakash ^{[1
]}

Roland, Paul J. ^{[1
]}

Kinner, Tyler ^{[1
]}

Yan, Yanfa ^{[1
]}

Collins, Robert W. ^{[1
]}

Heben, Michael J. ^{[1
]}

Ellingson, Randy. J. ^{[1
]}

机构：

[1] Univ Toledo, Dept Phys & Astron, Wright Ctr Photovolta Innovat & Commercializat, Toledo, OH 43606 USA

来源：

2014 IEEE 40TH PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC) | 2014年

关键词：

back contact; cadmium telluride; hydrazine; iron persulfide; iron pyrite; nanocrystal; copper-free; carrier density; mobility; TEMPERATURE-DEPENDENCE; ENERGY-GAP; BAND-GAP; SPECTROSCOPY; CONDUCTION; SOLIDS; CU;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

We describe the application of iron persulfide (pyrite, FeS2) NC thin films as a Cu-free back contact to CdS/CdTe solar cells. We synthesized cubic FeS2 NCs, and prepared NC-FeS2 films by drop-casting to investigate their use in thin film solar cells. Characterization of the FeS2 NC films revealed sub-band-gap optical absorption, holes as the majority carrier, free hole concentration of similar to 10(19) cm(-3), and Hall mobility of mu(h) << 1 cm(2) V-1S-1. CdS/CdTe solar cells completed by depositing hydrazine-treated NC-FeS2 back contacts directly onto CdTe displayed efficiencies comparable to those of standard Cu/Au back contact devices. Our best FeS2 device shows an AM1.5G efficiency of 12.5%, V-oc = 0.81 V, J(sc) = 23.0 mA/cm(2), and FF = 67%. Temperature dependent studies of solar cells reveal that the ' roll-over' effect observed in standard devices at low temperature is controlled by replacing Cu by hydrazinetreated NC-FeS2.

引用

页码：2293 / 2298

页数：6

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