Energy transfer in ternary blend organic solar cells: Recent insights and future directions

Mohapatra, AA and Tiwari, V and Patil, S (2021) Energy transfer in ternary blend organic solar cells: Recent insights and future directions. In: Energy and Environmental Science, 14 (1). pp. 302-319.

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Abstract

Resonance energy transfer (RET) can potentially improve the device efficiencies of ternary blend organic solar cells (TBSCs). However, several parameters, such as domain morphology, exciton lifetime, energy and charge transfer, influence the resulting photophysics. Owing to this, spectroscopic studies on TBSCs have not unambiguously deconvolved the role of RET in the observed enhancement of photocurrent densities, often downplaying the mechanistic aspects of the RET associated enhancement. In this perspective, we discuss and analyse the role of RET in enhancing the device efficiency by taking a few recent examples of TBSCs. Taking analogy from natural photosynthetic systems, we argue that deviations in the observed RET rates from a Förster type mechanism may be at play. We suggest new strategies to systematically correlate the Förster critical distance (R0) with increments in current density (?JSC) in order to gain mechanistic insights to optimize RET enhanced photocurrent for high efficiency organic solar cells. © The Royal Society of Chemistry.

Item Type:	Journal Article
Publication:	Energy and Environmental Science
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright of this article belongs to Royal Society of Chemistry
Keywords:	Charge transfer; Energy transfer; Photocurrents; Photophysics; Spectroscopic analysis, Device efficiency; Domain morphology; Exciton lifetime; Mechanistic aspects; Photocurrent density; Photosynthetic systems; Resonance energy transfer; Spectroscopic studies, Organic solar cells
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	09 Mar 2021 08:22
Last Modified:	09 Mar 2021 08:22
URI:	http://eprints.iisc.ac.in/id/eprint/68117

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