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
Wang, GJ [Wang, Guojie][ 1,2 ]
Jiu, TG [Jiu, Tonggang][ 1 ]
Tang, G [Tang, Gang][ 1 ]
Li, J [Li, Jun][ 1 ]
Li, PD [Li, Pandeng][ 1 ]
Song, XJ [Song, Xiaojin][ 2 ]
Lu, FS [Lu, Fushen][ 2 ]
Fang, JF [Fang, Junfeng][ 1 ]
摘要： We used cesium stearate (CsSt) to modify the interface of the electron- extracting contact in inverted organic solar cells. Surface microstructure, optical properties, and electrical characterization as well as exciton generation rate and dissociation probability were investigated to understand the impact of CsSt on the interface contact. The results indicated that by incorporation of CsSt, the surface morphology and energy level as well as conductivity of a zinc oxide (ZnO) film were improved. On the basis of the above properties, highly efficient inverted organic solar cells have been demonstrated by using a ZnO nanoparticle film and CsSt stacked bilayer structure as the cathode interfacial layer. The insertion of a CsSt layer between the ZnO film and active layer improved the electron extraction efficiency, and a high power conversion efficiency (PCE) of 8.69% was achieved. The PCE was improved by 20% as compared to the reference device using a ZnO-only electron extraction layer.
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 ]
Liu, XH [Liu, Xiaohui][ 1 ]
Wang, XY [Wang, Xueyan][ 1 ]
Zhao, LX [Zhao, Lixiao][ 1 ]
Jiu, TG [Jiu, Tonggang][ 1 ]
Fang, JF [Fang, Junfeng][ 1 ]
摘要： A biobased monofunctional compatibilizer (called Epicard) is first synthesized by the reaction of cardanol with epichlorohydrin as confirmed by Fourier transform infrared and 1H NMR. Subsequently, biosourced polymers, polylactide (PLA) and starch, are melt-blended by a twin-screw extruder with Epicard. Confirmed by the measurements of contact angle and 1H nuclear magnetic resonance of the extracted starches from PLA/starch/Epicard blends, the Epicard only possesses a monoepoxy group to mainly react with starch and then increased the hydrophobicity of the starches during the melt-blending process. As a result, an obvious improvement to the interfacial adhesion between starch and PLA is observed by the scanning electron microscopy. Furthermore, the tensile properties of PLA/starch blends are effectively improved with the addition of Epicard. This study suggests a simple but effective material technique by utilizing a novel plant oil modifier to increase interfacial adhesion in fabricating fully biobased PLA/starch blends with superior tensile properties.
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.
提交时间： 2017-05-02
Zhang, WJ [Zhang, Wenjun][ 1 ]
Min, C [Min, Chao][ 1 ]
Zhang, Q [Zhang, Qu][ 1 ]
Li, XD [Li, Xiaodong][ 1 ]
Fang, JF [Fang, Junfeng][ 1 ]
摘要： Cathode interlayer is essential to inverted bulk heterojunction polymer solar cells [PSCs]. A series of zwitterionic ammonium and neutral amino organic molecules are introduced into inverted PSCs as cathode interlayer and power conversion efficiency [PCE]
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