Direct Evaluation of Organic Photovoltaic Performance by Xe-flash Time-Resolved Microwave Conductivity

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  • SAEKI Akinori
    Department of Department of Applied Chemistry, Graduate School of Engineering, Osaka University PRESTO, Japan Science and Technology Agency (JST)

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  • 白色光パルス・マイクロ波伝導度法による有機薄膜太陽電池性能の直接評価
  • ハクショクコウ パルス ・ マイクロハ デンドウドホウ ニ ヨル ユウキ ハクマク タイヨウ デンチ セイノウ ノ チョクセツ ヒョウカ

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Abstract

Organic photovoltaic (OPV) devices have emerged as viable candidates for sunlight energy harvesting. However, a reliable technique for the rapid screening of materials and processes is a prerequisite towards faster development in this area. Here we review such a versatile evaluation technique for bulk heterojunction OPVs by the combination of time-resolved microwave conductivity (TRMC) and 10 µs white-light pulses from a Xe flash-lamp. This technique allows direct and efficient examination of p/n blend ratio, solvent choice, and annealing effects without requiring fabrication of the actual device. Based on the established correlation between the device performances and TRMC transients in the typical BHJ of P3HT and phenyl-C61-butyric acid methyl ester (PCBM), we extended the research to low bandgap polymers and demonstrated the feasibility of this evaluation. The TRMC technique can be used not only for the speedy process optimization of novel conjugated polymers, but also for rational engineering of novel molecular design.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 70 (8), 370-385, 2013

    The Society of Polymer Science, Japan

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