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Influence of Thickness and Annealing Temperature on the Optical Properties of Spin-Coated Photoactive P3HT:PCBM Blend

Year: 2013

Type: article

Abstract: Influence of annealing temperature and thickness on the optical characteristics of the blend of poly (3-hexylthiophene) (P3HT) and Phenyl C61 butyric acid methylester (PCBM) layer has been investigated in this report.Photoactive polymer material (P3HT:PCBM) was deposited on indium tin oxide (ITO) substrate by spin-coating.The morphology of P3HT:PCBM composite layer was investigated by Atomic Force Microscope (AFM).The surface roughness was found to reduce after heat treatment.The absorption of the composite layer was found to increase with its number of layer (thickness).On the other hand, the photoluminescence (PL) quenching, which indicates efficient charge separation in the bulk heterojunction, was found higher for the thinner layer.Absorption was also found to increase with the annealing temperature.Therefore, to optimize the thickness of the P3HT:PCBM photoactive layer that will provide best absorption while providing efficient charge separation, annealing at optimized temperature might be an effective tool.

Source: Optics and Photonics Journal

DOI: 10.4236/opj.2013.38a004

Authors: Md. Shahinul Islam, Md. Earul Islam, Abu Bakar Md. Ismail, Hartmut Baerwolff

Institutions: University of Rajshahi, TH Köln - University of Applied Sciences

Language: English

Topic: Organic Electronics and Photovoltaics

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W2001128905

FWCI: 0.93

Cites: 22

Cited by: 17

Related to: 10