The effect of temperature on resistive ZnO layers and the performance of thin film CdTe solar cells
journal contributionposted on 09.12.2016 by Francesco Bittau, Ali Abbas, Kurt L. Barth, Jake Bowers, Michael Walls
Any type of content formally published in an academic journal, usually following a peer-review process.
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 °C to 400 °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 °C and highest at 400 °C, ranging from 10− 2 Ω·cm to 0.33 Ω·cm. The high temperature deposited ZnO exhibits improved micro-structural growth and an improvement in device efficiency.
EPSRC SUPERGEN SuperSolar Hub funding (EP/J017361/1).
- Mechanical, Electrical and Manufacturing Engineering