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Additional coating effects on textured ZnO : Al thin films as transparent conducting oxides for thin‐film Si solar cells
Author(s) -
Moon Taeho,
Jun Jin Hyung,
Lee Hyun,
Yoon Wonki,
Kim Soohyun,
Lee ByungKee,
Lee HongCheol,
Kim Wooyoung,
Ahn SehWon,
Lee Sungeun,
Lee HeonMin
Publication year - 2012
Publication title -
progress in photovoltaics: research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.286
H-Index - 131
eISSN - 1099-159X
pISSN - 1062-7995
DOI - 10.1002/pip.1137
Subject(s) - materials science , coating , layer (electronics) , thin film , etching (microfabrication) , solar cell , optoelectronics , oxide , quantum efficiency , nanotechnology , chemical engineering , metallurgy , engineering
ZnO : Al films were additionally deposited on textured transparent conducting oxide thin films to improve the surface morphologies formed in the etching process. The efficiency of the µc‐Si : H cell was enhanced from 7.0% (uncoated) to 8.0% (150‐nm‐coated) because of the additional coating. The quantum efficiency evaluation with a reverse bias voltage showed that the additional coating suppressed the carrier recombination problem. To systematically analyze the change of the i‐layer quality, the changes of ( μτ ) eff and fill factor ( FF ) were analyzed using a variable illumination measurement technique, and the results clearly confirmed the enhancement of i‐layer quality due to the additional coating. Copyright © 2011 John Wiley & Sons, Ltd.