不同环境压强下溶剂退火对聚合物太阳能电池性能的影响-发光学报.pdfVIP

第36卷摇 第4期 发摇 光摇 学摇 报 Vol郾36 No郾4 2015年4月 CHINESEJOURNAL OF LUMINESCENCE Apr. ,2015 文章编号:1000鄄7032(2015)04鄄0443鄄06 不同环境压强下溶剂退火对聚合物太阳能电池性能的影响 郑力华,张摇 健,邢摇 聪,周摇 发,许文鹏,李传南* (集成光电子学国家重点联合实验室 吉林大学电子科学与工程学院,吉林 长春摇 130012) 摘要:通过改变溶剂退火时的环境压强控制溶剂的蒸发速率,在不同压强下进行加压溶剂退火制备了基于 聚鄄3 己基噻吩颐富勒烯衍生物(P3HT颐PCBM)的体异质结聚合物太阳能电池。 X射线衍射(XRD)、紫外鄄可见 吸收光谱(UV鄄Vis)以及原子力显微镜(AFM)的测试结果表明,增大溶剂退火的环境气压改善了薄膜的结晶 度,增强了有源层的光吸收,提高了P3HT和PCBM 的相分离程度,更有利于激子的解离和载流子传输。 与在 常压下溶剂退火相比,在2.0 MPa压强下对有源层进行溶剂退火的器件的光电转换效率提高了29%,达到了 3.69%。 关摇 键摇 词:聚合物太阳能电池;环境压强;加压溶剂退火 中图分类号:TM914.4摇 摇 摇 文献标识码:A摇 摇 摇 DOI:10.3788/ fgx0443 Effect of Variation in Environmental Pressure of Solvent Annealing on The Performance of Polymer Solar Cells ZHENG Li鄄hua,ZHANGJian,XING Cong,ZHOU Fa,XU Wen鄄peng,LI Chuan鄄nan* (StateKey Laboratory on Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,China) *Corresponding Author,E鄄mail:licn@ Abstract:Polymer solar cells based on blends of poly(3鄄hexylthiophene) (P3HT) and [6,6]鄄 phenyl鄄C 鄄butyric acid methyl ester (PCBM) were fabricated by solvent annealing under different 61 environmental pressures. The performance of the solar cells were tested by X鄄ray diffraction (XRD),atomicforcemicroscopy (AFM)imagesandabsorptionspectra. Byincreasingtheenviron鄄 mental pressure of solvent annealing,the optical absorption of the active layer was enhanced,the crystallinity of the active layer andthephase segregation of P3HT andPCBMwere improved,which facilitatedphotogeneratedexciton dissociation andcharge鄄carriertransport. Thepower conversion ef鄄 ficiency ofthepolymer solarcellfabricatedby solventannealingunder2.0 MPais3.69