The effect of temperature on resistive ZnO layers and the performance of thin film CdTe solar cells

THIN SOLID FILMS

卷:633

Article; Proceedings Paper

Bittau, F.¹  Abbas, A.¹  Barth, K. L.²  Bowers, J. W.¹  Walls, J. M.¹ 

[1] Loughborough Univ Technol, Wolfson Sch Mech Elect & Mfg Engn, CREST, Loughborough LE11 3TU, Leics, England

[2] Colorado State Univ, NSF I UCRC Next Generat Photovolta, Ft Collins, CO 80523 USA

关键词: Cadmium telluride;    Zinc oxide;    Thin films;    Electrical resistivity;    Solar cells;   

DOI  :  10.1016/j.tsf.2016.10.068

来源: Elsevier

【 摘 要 】

The use of a highly resistive transparent (HRT) layer has been shown to increase the efficiency of thin film CdTe heterostructure solar cells incorporating a thin CdS layer. In this study ZnO HRT layers were deposited at different substrate temperatures on soda lime glass and on fluorine-doped tin oxide-coated glass to enable structural, optical and electrical characterization. The performance of equivalent films was tested within CdS/CdTe solar cells. The ZnO thickness was limited to 150 nm, whilst the substrate temperature was varied from 20 degrees C to 400 degrees C during deposition. X-ray diffraction patterns and transmission electron microscopy of the cross-sectional microstructure of completed devices showed that the growth of the ZnO is improved when the films are deposited at higher temperatures. Film resistivity was lowest at 100 degrees C and highest at 400 degrees C, ranging from 10(-2) Omega.cm to 033 Omega.cm. The high temperature deposited ZnO exhibits improved micro-structural growth and an improvement in device efficiency. (C) 2016 The Authors. Published by Elsevier B.V.

【 授权许可】

Free