Doped silicon nanoparticles for enhanced charge transportation in organic-inorganic hybrid solar cells

Hemaprabha, Elangovan and Pandey, Upendra K and Chattopadhyay, Kamanio and Ramamurthy, Praveen C (2018) Doped silicon nanoparticles for enhanced charge transportation in organic-inorganic hybrid solar cells. In: SOLAR ENERGY, 173 . pp. 744-751.

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Abstract

In this work, we have added p-type and n-type Si nanoparticles (NPs) obtained from cryomilling, in poly(3-hexylthiophene) (P3HT) and 6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) organic photovoltaic cell at different weight ratios and their effect on organic-inorganic hybrid solar cell device parameters has been evaluated. It is observed that the addition of p-type nanoparticles tailors the energy band alignment at the P3HT/NP interface which provides efficient charge carrier transport enhancing the photo-conversion efficiency by more than 21%. Enhancement is reflected by an improvement in short-circuit current by similar to 35% with respect to reference P3HT:PC61BM device without Si NPs. However, for n-type NPs where the optimum cascading band alignment does not occur, only 10% improvement in photo-conversion efficiency is observed. This work provides insight into how the performance of organic solar cells can be tailored by size factor as well as byenergy level tuning of the added nanoparticles.

Item Type:	Journal Article
Publication:	SOLAR ENERGY
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright of this article belongs to PERGAMON-ELSEVIER SCIENCE LTD
Keywords:	Hybrid solar cell; Silicon nanoparticle; Energy level alignment; Exciton dissociation
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	24 Jan 2019 10:13
Last Modified:	24 Jan 2019 10:13
URI:	http://eprints.iisc.ac.in/id/eprint/61403

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