Highly efficient inverted polymer solar cells using aqueous ammonia processed ZnO as an electron selective layer

作者：Zhu, Xiao-Zhao; Zu, Feng-Shuo; Xu, Mei-Feng; Shi, Xiao-Bo; Jin, Zhi-Ming; Wang, Zhao-Kui^*; Liao, Liang-Sheng

来源：Applied Physics A, 2014, 116(3): 993-999.

DOI：10.1007/s00339-014-8275-9

• POWER CONVERSION EFFICIENCY
• PHOTOVOLTAIC CELLS
• OXIDE
• TEMPERATURE
• VACUUM

The authors demonstrate a simple method to deposit solution-processable ZnO thin film by directly dissolving the ZnO powder into aqueous ammonia. ZnO film casting from its aqueous ammonia solution (a-ZnO) is used successfully as an electron selective layer in poly(3-hexylthiophene) and indene-C-60 bisadduct (IC(60)BA) based heterojunction solar cells with improved power conversion efficiency (PCE) compared with that using conventional sol-gel based ZnO (c-ZnO). The improved PCE is mainly attributed to an increase of short-circuit current density owing to the better transmittance of a-ZnO than that of c-ZnO in the absorption range of IC(60)BA, and efficient electron extraction at cathode. In addition, no additional by-products originated from the organic solvents are introduced as like in sol-gel based ZnO films.

• 出版日期2014-9
• 单位苏州大学