Acceptor blending ratio dependence of bulk heterojunction organic photovoltaic devices

作者：Yi Haebong^*; Im Chan; An Jongdeok; Lee Sunae; Park Hoon

来源：Journal of the Korean Physical Society, 2014, 64(6): 910-916.

DOI：10.3938/jkps.64.910

• Organic photovoltaics
• P3HT
• PCBM
• ICBA
• Bulk heterojunction

Bulk heterojunction (BHJ) organic photovoltaic (OPV) devices are generally composed of a blend film of a pi-conjugated polymeric electron donor and a C-60 derivative electron acceptor intercalated between an anode and a cathode, typical of a two-dimensional device structure. Often, a regioregular poly(3-hexylthiophene) (rr-P3HT) and indene-C-60 bisadduct (ICBA) blend film is used as the BHJ active layer instead of the conventional P3HT and phenyl-C-61-butyric acid methyl ester (PCBM) blend film due to the ICBA device%26apos;s higher power conversion efficiency (PCE), which is correlated with its higher open-circuit voltage (V (OC) ). To determine the quantitative influences of those electron acceptors in the BHJ OPV devices, we prepared various devices of acceptors, either PCBM or ICBA, with a wide range of blending ratios (from 0 to 100%) for estimating their typical optoelectronic properties, e.g., UV-visible absorption spectra, photoluminescence intensity, surface morphology, and photovoltaic device parameters. Obtained data were compared to each other and were analyzed as a function of their acceptor blending ratio.

• 出版日期2014-3