Optical and electronic property tailoring by MoS2-polymer hybrid solar cell

Kesavan, Arul Varman and Rao, Arun D and Ramamurthy, Praveen C (2017) Optical and electronic property tailoring by MoS2-polymer hybrid solar cell. In: ORGANIC ELECTRONICS, 48 . pp. 138-146.

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Abstract

The ternary blend system such as binary donor and an acceptor or binary acceptor and a donor offers a way to improve the power conversion efficiency of the polymer solar cells (PSCs) by enhancing optical properties and electrical properties. In this work, PTB7, PC71BM and Molybdenum disulfide nano-sheet (MoS2NS) ternary blend system were investigated as an active material for OPV. The optimized ternary blend system showed increment of 17% power conversion efficiency (PCE) from 6.98% to 8.18%. The origin of improved PCE mainly arises from the significant increment in JSC and marginal change in V-OC and FF. This improved PCE is due to increased light harvesting and improved charge carrier mobility in the active matrix. The marginal enhancement in V-OC and FF was correlated with the density of trap states (DOS) obtained from capacitance measurement of the device. The optical absorption and energy transfer mechanism of the ternary blend film is explained by absorption and photoluminescence measurement respectively. Further, the conversion efficiency due to improved charge carrier transport was described by modified SCLC mobility measurements for electron and hole only devices. The obtained result suggests that presence of MoS2NS along with PTB7: PC71BM binary system play dual role like an improved charge transport layer as well as light harvesting. (C) 2017 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	ORGANIC ELECTRONICS
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	03 Aug 2017 09:10
Last Modified:	03 Aug 2017 09:10
URI:	http://eprints.iisc.ac.in/id/eprint/57561

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