The Improvement of Bulk-Heterojunction Order in Polymer Photovoltaic Device

Abstract：The blend morphology and vertical arrangement are critical to the performance of organic bulk-heterojunction photovoltaic devices.In the present paper,the authors proposed a new annealing method that controis the blend morphology and vertical arrangement of two materials by means of simultaneously applying external electrical field and violet irradiation on the active layer of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) during annealing process.By using this annealing method,the power conversion efficiency increased by 36％,which was caused by vertical phased-separated blend of crystalline P3HT and PCBM and better charge extraction of electrodes.X-ray photoelectron spectroscopy (XPS) was measured to prove more fullerene derivatives at the organic/cathode interfaces by using this annealing method.The X-ray diffraction (XRD) analysis and UV-Vis absorption spectrum analysis also revealed more ordered polymer crystallization. 作者： Author： YUAN Dan  CHEN Zhi-jian  XIAOLi-xin  MULi-ping  QU Bo  GONG Qi-huang 作者單位： State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China 期 刊： 光譜學與光譜分析   ISTICEISCIPKU Journal： Spectroscopy and Spectral Analysis 年，卷(期)： 2011, 31(12) 分類號： O482.7 Keywords： Polymer photovohaic device    Bulk-heterojunction    Annealing method    機標分類號： O6 TN3 機標關鍵詞： fullerene derivatives    conversion efficiency    spectrum analysis    blend    active layer    performance    X-ray    materials    UV-Vis    during    better    power    paper    means    poly    acid    XRD    XPS    two    new 基金項目： This work was financially supported by the National Natural.Science Foundation of China under grant No，the National Basic Research Program of China under grant No The Improvement of Bulk-Heterojunction Order in Polymer Photovoltaic Device[期刊論文]  光譜學與光譜分析 --2011, 31(12)The blend morphology and vertical arrangement are critical to the performance of organic bulk-heterojunction photovoltaic devices.In the present paper,the authors proposed a new annealing method that c...

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