https://scholars.lib.ntu.edu.tw/handle/123456789/504256
標題: | Efficient poly(3-hexylthiophene)-based bulk heterojunction solar cells fabricated by an annealing-free approach | 作者: | Chang, Y.-M. Wang, L. |
公開日期: | 2008 | 出版社: | American Chemical Society | 卷: | 112 | 期: | 45 | 起(迄)頁: | 17716-17720 | 來源出版物: | Journal of Physical Chemistry C | 摘要: | A simple method for preparing spin-coated photoactive films with high crystalline poly(3-hexylthiophene) (P3HT) without annealing was developed. It involves the incorporation of a small amount of the P3HT monomer, 3-hexylthiophene (3HT), into the P3HT/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) solution from which the films were prepared. The UV-visible spectrum of the thus-prepared film includes pronounced crystallization peaks with higher absorbance over the whole range of wavelengths, 450-650 nm, than that of the film prepared from a coating solution without 3HT. X-ray diffraction (XRD) data also reveal a smaller interlayer distance between conjugated backbones in the 3HT-processed film than the conventional film. The TEM image of the as-cast 3HT-processed film demonstrates a nanoscaled phase separation and interpenetrating network morphology like those of a thermally annealed conventional film. Polymer solar cells based on such 3HT-processed bulk heterojunction films exhibit an enhanced photocurrent and fill factor without any pre- or postannealing treatment and a similar power conversion efficiency and incident photo-to-electron conversion efficiency to those of conventional annealed solar cells, indicating the feasibility of this annealing-free approach for fabricating high-efficiency polymer solar cells. © 2008 American Chemical Society . |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/504256 | ISSN: | 19327447 | DOI: | 10.1021/jp804909a | SDG/關鍵字: | Annealing; Carrier mobility; Conversion efficiency; Esters; Fatty acids; Heterojunctions; Monomers; Phase separation; Photovoltaic cells; Plastic coatings; Polymer films; Polymers; Solar cells; Solar energy; Solar equipment; X ray analysis; Absorbance; As casts; Bulk heterojunction solar cells; Bulk heterojunctions; Butyric acid methyl esters; Coating solutions; Conjugated backbones; Conventional films; Crystallization peaks; Fill factors; Interlayer distances; Interpenetrating networks; Nanoscaled; Photoactive films; Polymer solar cells; Postannealing treatments; Simple methods; TEM images; Uv-visible; X-ray diffractions; Film preparation |
顯示於: | 凝態科學研究中心 |
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