分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02
Li, XD [Li, Xiaodong][ 1,3 ]
Zhang, WJ [Zhang, Wenjun][ 1 ]
Wang, XY [Wang, Xueyan][ 1,3 ]
Wu, YL [Wu, Yulei][ 1 ]
Gao, F [Gao, Feng][ 2 ]
Fang, JF [Fang, Junfeng][ 1 ]
摘要： A small-molecule electrolyte based on the popular ethylene diamine tetraacetic acid (EDTA-N) is introduced as an efficient cathode inter- layer in inverted polymer solar cells, helping to deliver power conversion efficiency over 9%. The strong dependence of device performance on the external bias suggests that the ion motion plays a critical role in improving the performance of devices with electrolyte interlayers.
提交时间： 2017-05-02
Zhang, WJ [Zhang, Wenjun][ 1 ]
Wu, YL [Wu, Yulei][ 1 ]
Bao, QY [Bao, Qinye][ 2,3 ]
Gao, F [Gao, Feng][ 2,3 ]
Fang, JF [Fang, Junfeng][ 1 ]
摘要： Two alcohol-soluble organic molecules are synthesized and introduced into inverted organic solar cells as the cathode interlayer. A power conversion efficiency as high as 9.22% is obtained by using the more hydrophobic molecule FTBTF-N as the cathode interlayer. Morphological studies suggest that design of the backbone can help to enhance short-circuit current density and fill factor.
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02
Li, XD [Li, Xiaodong][ 1,3 ]
Wang, XY [Wang, Xueyan][ 1,3 ]
Zhang, WJ [Zhang, Wenjun][ 1 ]
Wu, YL [Wu, Yulei][ 1 ]
Gao, F [Gao, Feng][ 2 ]
Fang, JF [Fang, Junfeng][ 1 ]
摘要： Planar heterojunction perovskite solar cells were fabricated through a low temperature approach. We find that the device performance significantly depends on the external bias before and during measurements. By appropriate optimization of the bias conditions, we could achieve an 8-fold increase in the power conversion efficiency. The significant improvement in device performance might be caused by the ion motion in the perovskite under the external electric field.
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02
Wu, YL [Wu, Yulei][ 1 ]
Liu, XH [Liu, Xiaohui][ 1,2 ]
Li, XD [Li, Xiaodong][ 1,2 ]
Zhang, WJ [Zhang, Wenjun][ 1 ]
Wang, HQ [Wang, Hai-Qiao][ 1 ]
Fang, JF [Fang, Junfeng][ 1 ]
摘要： Environmentally benign hybrid interlayers are prepared by modifying the zinc sulfide (ZnS) with phenanthroline/derivatives and utilized in inverted polymer solar cells (PSCs). Performances of the inverted PSCs are improved enormously by incorporating these hybrid inter- layers, as which can effectively improve the energy level alignment, electron mobility, surface morphology, and interfacial contact. Greatly improved power conversion efficiencies (PCEs) of 7.79%, 8.00%, 7.47%, and 7.56% are achieved with these hybrid interlayers ZnS-BCP, ZnS-Bphen, ZnS-Mphen, and ZnS-Phen, respectively, compared to the PCE of 2.99% of the reference ZnS-based device, based on PTB7:PC71BM active layer. Our results demonstrate that hybrid interfacial materials comprising inorganic and organic semiconductor possess promising potential to improve the performance of organic electronic devices, and set an example to develop this novel class of interfacial materials for electronic devices.
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