High efficiency bulk heterojunction organic solar cell by using high conductivity modified PEDOT: PSS as a buffer layer

Zhen-bo Deng; Zheng Chen; Hui Wu; Zhao-yue Lü; Hai-liang Du; Ye Zou; Guo-liang Zhang; Mao-yang Zhou

doi:10.1007/s11801-012-2242-5

Optoelectronics Letters ›› 2012, Vol. 8 ›› Issue (5) : 336 -339. DOI: 10.1007/s11801-012-2242-5

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High efficiency bulk heterojunction organic solar cell by using high conductivity modified PEDOT: PSS as a buffer layer

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Abstract

In this paper, bulk heterojunction solar cells with poly-(3-hexylthiophene) (P3HT): [6,6]-phenyl-C61-butyric-acid-methylester (PCBM) as an active layer and modified poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) as a buffer layer are fabricated. The buffer layer is modified by adding 1% to 5% dimethyl sulfoxide (DMSO) into PEDOT: PSS solution before spin-coating. The conductivity of modified PEDOT:PSS and the performance of solar cells with modified PEDOT:PSS are measured. The highest conductivity of modified PEDOT:PSS with 4% DMSO can achieve 89.693 S/cm. The performance of organic solar cell with PEDOT:PSS modified by 4% DMSO is the best. The 4% DMSO-modified-PEDOT:PSS cell has a power conversion efficiency of 3.34%, V_oc of 5.7 V, J_sc of 14.56 mA/cm² and filling factor (FF) of 40.34%.

Keywords

Solar Cell / Buffer Layer / Power Conversion Efficiency / Organic Solar Cell / Bulk Heterojunction

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Zhen-bo Deng, Zheng Chen, Hui Wu, Zhao-yue Lü, Hai-liang Du, Ye Zou, Guo-liang Zhang, Mao-yang Zhou. High efficiency bulk heterojunction organic solar cell by using high conductivity modified PEDOT: PSS as a buffer layer. Optoelectronics Letters, 2012, 8(5): 336-339 DOI:10.1007/s11801-012-2242-5

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