Mohammad, Tauheed and Kumar, Vinod and Kumar, Mahesh and Upadhyaya, Hari M. and Dutta, Viresh (2020) Forster resonance energy transfer in organic photovoltaics devices fabricated by electric field assisted spray technique. Solar Energy, 209. pp. 379-386. ISSN 0038-092X

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Abstract

Thin films of the ternary polymer blend (donors PCE-10 and PCDTBT with the acceptor PC71BM in chlombenzene) were fabricated by using spray coating technique without and with applied voltage to the nozzle during deposition. The increased absorption range from 400 nm to 800 nm indicates that Forster resonance energy transfer (FRET) is occurring for the films deposited under the electric field. This is also supported by photo-luminescence measurements and suggesting that under the applied voltage the orientation of polymer chains are changing at desired distances to facilitate FRET phenomenon to occur due to repulsion between uniformly charged ultrafine droplets. The size of droplets further reduced at higher applied voltage. Absorption, photo-luminescence, femtosecond transient absorption spectra and Kinetics traces were recorded to elucidate the role of applied DC voltages during the deposition of these films on photovoltaic performance of bulk heterojunction organic solar cell. The effect of FRET in polymer-polymer thin film under applied voltage during the deposition is observed, which indicates enhancement in the power conversion efficiency with the maximum value of 6.86% (J(sc) of 15.81 mA/cm(2) and V-oc of 0.77 V) at an applied voltage of 750 V.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Energy Fuels
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	01 Apr 2022 09:58
Last Modified:	01 Apr 2022 09:58
URI:	http://npl.csircentral.net/id/eprint/4728

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