Chaudhary, Dhirendra K. and Kumar, Pankaj and Kumar, Lokendra (2017) Impact of CH3NH3PbI3-PCBM bulk heterojunction active layer on the photovoltaic performance of perovskite solar cells. Chemical Physics Letters, 685. pp. 210-216. ISSN 0009-2614

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Abstract

We report here the impact of CH3NH3PbI3-PCBM bulk heterojunction (BHJ) active layer on the photovoltaic performance of perovskite solar cells. The solar cells were prepared in normal architecture on FTO coated glass substrates with compact TiO2 (c-TiO2) layer on FTO as electron transport layer (ETL) and poly(3-hexylthiophene) (P3HT) as hole transport layer (HTL). For comparison, a few solar cells were also prepared in planar heterojunction structure using CH3NH3PbI3 only as the active layer. The bulk heterojunction CH3NH3PbI3-PCBM active layer exhibited very large crystalline grains of 2-3 mu m compared to similar to 150 nm only in CH3NH3PbI3 active layer. Larger grains in bulk-heterojunction solar cells resulted in enhanced power conversion efficiency (PCE) through enhancement in all the photovoltaic parameters compared to planar heterojunction solar cells. The bulk-heterojunction solar cells exhibited similar to 9.25% PCE with short circuit current density (Jsc) of similar to 18.649 mA/cm(2), open circuit voltage (Voc) of 0.894 V and Fill Factor (FF) of 0.554. There was similar to 36.9% enhancement in the PCE of bulk-heterojunction solar cells compared to that of planar heterojunction solar cells. The larger grains are formed as a result of incorporation on PCBM in the active layer.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Chemistry > Physical Chemistry Physics
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	10 Oct 2018 08:52
Last Modified:	10 Oct 2018 08:52
URI:	http://npl.csircentral.net/id/eprint/2741

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