Photovoltaic properties of thin film heterojunctions with cupric oxide absorber

被引：54

作者：

Dimopoulos, T. ^{[1
]}

Peic, A. ^{[1
]}

Muellner, P. ^{[1
]}

Neuschitzer, M. ^{[2
]}

Resel, R. ^{[2
]}

Abermann, S. ^{[3
]}

Postl, M. ^{[4
]}

List, E. J. W. ^{[2
,4
]}

Yakunin, S. ^{[5
]}

Heiss, W. ^{[5
]}

Brueckl, H. ^{[1
]}

机构：

[1] Austrian Inst Technol, Hlth & Environm Dept, A-1220 Vienna, Austria

[2] Graz Univ Technol, Inst Solid State Phys, A-8010 Graz, Austria

[3] Austrian Inst Technol, Dept Energy, A-1210 Vienna, Austria

[4] NanoTecCtr Weiz Forsch Gesell mbH, A-8160 Weiz, Austria

[5] Johannes Kepler Univ Linz, Inst Semicond & Solid State Phys, A-4040 Linz, Austria

来源：

JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY | 2013年 / 5卷 / 01期

关键词：

SOLAR-CELLS; NICKEL-OXIDE; PHOTOELECTROCHEMICAL PROPERTIES; CUO/ZNO HETEROCONTACT; OPTICAL-PROPERTIES; COPPER; CUO; ZNO; NIO; SUPERCONDUCTORS;

D O I：

10.1063/1.4791779

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work, we report on the fabrication, characterization, and photovoltaic properties of sputter-deposited, thin film heterojunctions combining p-type cupric oxide (CuO) absorber with n-type ZnO. The structural investigation reveals highly crystalline, columnar growth of the layers and confirms that the absorber's phase is purely CuO, with only negligible traces of Cu2O. The optical characterization yields for CuO an indirect bandgap of 1.2 eV and a direct optical transition at approximately 3 eV. The short circuit current, open circuit voltage, fill factor, and power conversion efficiency of the heterojunction solar cells were extracted as a function of the CuO thickness under AM1.5G (1 kW/m(2)) illumination. From the observed dependencies, we conclude that the photovoltaic performance is compromised by a restricted carrier collection efficiency, caused by the small carrier lifetime in CuO. Indeed, the carrier population is found to decay with time constants of 40 and 460 ps. A maximum power conversion efficiency of 0.08% was obtained for the solar cell with CuO thickness of 500 nm. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4791779]

引用

页数：11

共 35 条

[1] Abundant non-toxic materials for thin film solar cells: Alternative to conventional materials [J].