Inverted Organic Solar Cells with Improved Performance using Varied Cathode Buffer Layers  

作　　者：Zhi-qiang Guan Jun-sheng Yu Yue Zang Xing-xin Zeng 

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated Devices,School of Optoelectronic Infor-mation,University of Electronic Science and Technology of China,Chengdu 510054,China

出　　处：《Chinese Journal of Chemical Physics》2012年第5期625-630,I0004,共7页化学物理学报（英文）

摘　　要：Organic solar cells with inverted planar heterojunction structure based on subphthalocya- nine and C60 were fabricated using several kinds of materials as cathode buffer layer （CBL）, including tris-8-hydroxy-quinolinato aluminum （Alq3）, bathophenanthroline （Bphen）, bathocuproine, 2,3,8,9,14,15-hexakis-dodecyl-sulfanyl-5,6,11,12,17,18-hexaazatrinaphthylene （HATNA）, and an inorganic compound of Cs2CO3. The influence of the lowest unoccupied molecular orbital level and the electron mobility of organic CBL on the solar cells perfor- mance was compared. The results showed that Alq3, Bphen, and HATNA could significantly improve the device performance. The highest efficiency was obtained from device with an- nealed HATNA as CBL and increased for more than 7 times compared with device without CBL. Furthermore~ the simulation results with space charge-limited current theory indicated that the Schottky barrier at the organic/electrode interface in inverted OSC structure was reduced for 27% by inserting HATNA CBL.

关 键 词：Organic solar cell Inverted structure Subphthalocyanine/C60 Cathode bufferlayer Space charge-limited current theory 

分 类 号：TN304.23[电子电信—物理电子学] TM914.4[电气工程—电力电子与电力传动]