Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 92: Poster Session: II-VI Semiconductors & ZnO and related Materials

HL 92.12: Poster

Thursday, March 29, 2012, 16:00–19:00, Poster D

Designing a dense blocking layer of electrochemically grown zinc oxide for hybrid solar cell applications — •Thilo Richter, Miriam Schwarz, and Veit Wagner — School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany

Electrochemical deposition of zinc oxide (ZnO) provides a low temperature, cost effective approach to designing crystalline, inorganic scaffolds in hybrid photovoltaics. In this context, a blocking layer between the p-type semiconductor and the anode is generally desired to prevent shunting in photovoltaic devices. We show that generating such a dense blocking layer during electrochemical growth of ZnO is not simply achievable by adjusting the main deposition parameters such as temperature, electrolyte concentration or voltage. Though, we demonstrate that the application of voltage variation during electrocrystallization is a possible way of controlling the ZnO growth. Dense blocking layers are possible if proper voltage variations are applied. Theoretical modeling of the results is presented based on solving the field diffusion equation of the relevant ions.