Architecture of monophase InSe thin film structures for solar cell applications

Teena, M and Kunjomana, A G and Ramesh, K and Venkatesh, R and Naresh, N (2017) Architecture of monophase InSe thin film structures for solar cell applications. In: SOLAR ENERGY MATERIALS AND SOLAR CELLS, 166 . pp. 190-196.

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Abstract

Control of microstructural evolution during the crystallization of InSe thin films is an inevitable strategy to mold their fundamental properties and potential for the fabrication of solar cells. Impact of annealing as well as substrate temperature on the crystallization progress and physical characteristics of thermally evaporated InSe was examined systematically, which eventually dictates the overall performance of resulting device. Structural and compositional characterizations have been thoroughly investigated by X-ray diffraction and energy dispersive X-ray analyses. InSe films form hexagonal structure with a preferred orientation of crystallites along the (004) direction upon crystallization. The layer of InSe is formed by two concomitant processes, deposition and recrystallization. Application of heat treatment resulted in topographical modification, which was probed by an atomic force microscope. Surface roughness was enhanced due to the influence of temperature and thereby the growth of grains. Investigations of electrical and optical properties, thus provided ample evidence for the use of crystallized monophase InSe as an absorber layer in photovoltaic conversion devices. Carrier concentration and mobility of charge carriers estimated from the Hall measurements were found to be 19.43x10(20) cm(-3) and 2.01 cm(2) V-1 s(-1) respectively. Moreover, this research work explores power conversion efficiency of p-InSe/n-CdS heterojunction solar cells.

Item Type:	Journal Article
Publication:	SOLAR ENERGY MATERIALS AND SOLAR CELLS
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	10 Jun 2017 04:36
Last Modified:	10 Jun 2017 04:36
URI:	http://eprints.iisc.ac.in/id/eprint/57137

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