Performance improvement of organic bulk heterojunction solar cells by using dihydroxybenzene as additive

Cong Yao; Li-ying Yang; Ya-ling Wang; Wen-jing Qin; Shougen Yin; Feng-ling Zhang

doi:10.1007/s11801-011-1034-7

Optoelectronics Letters ›› 2011, Vol. 7 ›› Issue (4) : 246-248. DOI: 10.1007/s11801-011-1034-7

Article

Performance improvement of organic bulk heterojunction solar cells by using dihydroxybenzene as additive

Cong Yao¹^,² ,
Li-ying Yang¹^,²^,^b ,
Ya-ling Wang¹^,² ,
Wen-jing Qin¹^,² ,
Shougen Yin¹^,² ,
Feng-ling Zhang¹^,³

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Abstract

We report the enhanced performance of organic solar cells (OSCs) based on regioregular poly(3-hexylthiophene) (P3HT) and methanofullerene [6,6]-phenyl C₆₁-butyric acid methyl ester (PCBM) blend by using dihydroxybenzene as additive in the active layer. The effect of the content of the additives on electrical characteristics of the device is studied. The device with 0.2 wt% dihydroxybenzene additive achieves the best power conversion efficiency (PCE) of 4.58% with J_sc of 12.5 mA/cm², V_oc of 0.65 V, and FF of 66.6% under simulated solar illumination of AM 1.5G (100 mW/cm²), compared with the control device with PCE of 3.39% (35% improvement compared with the control device). The XRD measurement reveals that the addition of additives induces the crystallization of P3HT and establishes good inter-network to increase the contact area of donor and acceptor, and then helps charge to be effectively transferred to the electrode to reduce the chance of recombination. All evidences indicate that the dihydroxybenzene is likely to be a promising new type additive that can enhance the performance of organic bulk heterojunction solar cells.

Keywords

Solar Cell / Active Layer / Fill Factor / Power Conversion Efficiency / Organic Solar Cell

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Cong Yao, Li-ying Yang, Ya-ling Wang, Wen-jing Qin, Shougen Yin, Feng-ling Zhang. Performance improvement of organic bulk heterojunction solar cells by using dihydroxybenzene as additive. Optoelectronics Letters, 2011, 7(4): 246‒248 https://doi.org/10.1007/s11801-011-1034-7

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This work has been supported by the National Natural Science Foundation of China (Nos.60876046 and 60976048), the Key Project of Chinese Ministry of Education (No.209007), Tianjin Natural Science Council (No.10ZCKFGX01900), the Scientific Developing Foundation of Tianjin Education Commission (No.20100723) and the Tianjin Key Discipline of Material Physics and Chemistry.