发光学报, 2018, 39 (3): 329, 网络出版: 2018-04-09  

基于P3HT给体的单/双受体平面异质结电池性能及其介电特性

Performance and Dielectric Property of Single/Double Acceptor Based Planar Heterojuntion Organic Photovoltaic Cells with P3HT Donor
作者单位
1 上海大学 材料科学与工程学院, 上海 200072
2 上海大学 新型显示技术与应用集成教育部重点实验室, 上海 200072
摘要
为了研究分析界面电荷等特性对器件的影响,制备了基于P3HT给体的单/双受体平面异质结(PHJ)有机太阳能电池(OPV)。首先研究了P3HT膜厚、P3HT溶剂和P3HT膜层的干燥时间对器件性能的影响。为了提高P3HT/SubPc PHJ电池的性能,采用双受体的三元器件结构(P3HT/SubNc/SubPc),制备了结构为ITO/PEDOT∶PSS/P3HT/SubNc/SubPc/BCP/Al的三元瀑布型OPV器件并研究了SubNc层厚度对其性能的影响。结果表明,在二元器件(P3HT/SubPc)体系中,P3HT溶于氯仿和1,2-二氯苯混合溶剂,成膜后干燥10 min退火获得的器件性能最佳。在三元器件中,随着SubNc厚度的增大,器件光电转换效率(PCE)先增大后减小。当SubNc厚度为5 nm时,器件PCE达到最大。相比于二元器件,三元器件的各项性能得到明显提升。最后,比较研究了不同厚度SubNc薄膜对器件介电特性的影响。
Abstract
To investigate the influence of interface charge on the performance of organic photovoltaic cells (OPVs), the single/double acceptor based planar heterojunction (PHJ) OPV based on P3HT donor were fabricated. Firstly, the effect of poly (3-hexylthiophene) (P3HT) film thickness, P3HT solvent, and the drying time of P3HT film on device performance was studied. To further improve the P3HT/SubPc PHJ performance, the cascade structure of ITO/PEDOT∶PSS/P3HT/chloroboron (Ⅲ) subnaphthalocyanine (SubNc)/boron subphthalocyanine chloride (SubPc)/BCP/Al including double acceptors was fabricated, and the influence of SubNc thickness was also investigated. In the single acceptor system, by using the mixed solvent (V(chloroform)∶V(ODCB)=1∶1) and drying in air for 10 min, the obtained P3HT film achieves the highest performance. While in the cascade structure, the power conversion efficiency (PCE) firstly rises then declines with the increase of SubNc thickness. When the SubNc thickness is 5 nm, the PCE is the highest. The photovoltaic parameters of cascade cell are all improved compared with the single acceptor based cells. Finally, to get insight into the physical mechanism between the interface charge and device performance, the effect of SubNc thickness on the dielectric characteristic of cascade cells was studied.

王超, 余俊乐, 杨芳, 魏斌, 郑燕琼. 基于P3HT给体的单/双受体平面异质结电池性能及其介电特性[J]. 发光学报, 2018, 39(3): 329. WANG Chao, YU Jun-le, YANG Fang, WEI Bin, ZHENG Yan-qiong. Performance and Dielectric Property of Single/Double Acceptor Based Planar Heterojuntion Organic Photovoltaic Cells with P3HT Donor[J]. Chinese Journal of Luminescence, 2018, 39(3): 329.

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