Effect of sol-gel derived ZnO annealing rate on light-trapping in inverted polymer solar cells
详细信息 查看全文
- 作者：Xuan Yu ; Xiaoming Yu ; Ziyang Hu ; Jianjun Zhang ; Gengshen Zhao ; Ying Zhao
- 关键词：Thin films ; Semiconductors ; ZnO ; Inverted polymer solar cells ; Light-trapping
- 刊名：Materials Letters
- 出版年：2013
- 出版时间：1 October, 2013
- 年：2013
- 卷：108
- 期：Complete
- 页码：50-53
- 全文大小：1314 K
文摘
Different morphology zinc oxide (ZnO) thin films were prepared by a sol-gel method using two annealing rates and used as the electron transport layers in inverted polymer solar cells. The morphology, optical and structure properties were performed by AFM, UV-vis and XRD in order to study the effect of annealing rates. The undulating morphology of ZnO film fabricated at a slow heating rate of 9 ¡ãC/min possesses a rougher surface than that of ZnO film annealed at the fast heating rate of 56 ¡ãC/min, which provides efficient light-trapping and increases photon absorption.
The resulting device shows 12.6 % and 6.7 % improvement in short current density and fill factor, respectively, compared with the device based on the rapidly annealed ZnO; a maximum power conversion efficiency of 2.55 % was achieved.