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, PD [Li, Pandeng][ 1,2 ]
Sun, CM [Sun, Chunming][ 1 ]
Jiu, TG [Jiu, Tonggang][ 1 ]
Wang, GJ [Wang, Guojie][ 1 ]
Li, J [Li, Jun][ 1 ]
Li, XF [Li, Xiaofang][ 2 ]
Fangt, JF [Fangt, Junfeng][ 1 ]
摘要： We reported the favorable cathode buffer layer based on a blend of ZnO nanoparticles (NPs) and TiO2 nanorods (NRs) applied to inverted solar cells. In addition to the high optical transmittance, the resultant blend film gave a relatively dense film with lower roughness than that of the respective single-component film. This improved the interface contact between the buffer layer and photoactive layer and therefore reduced the contact resistance and leakage current. Moreover, the combination of NRs and NPs increased the efficiency of electron transport and collection by providing both a direct path for electron transport from TiO2 NRs and a large contact area between ZnO NPs and the active layer. Consequently, both the short-circuit current density (Jsc) and fill factor (FF) in the device were improved, leading to an improvement of the device performance. The best power conversion efficiency (PCE) based on the blend film as the buffer layer reached 8.82%, which was preferable to those of a single ZnO NP film (7.76%) and a TiO2 NR-based device (7.66%). KEYWORDS: ZnO nanoparticles, TiO2 nanorods, blend film, cathode buffer layer, inverted solar cells
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.
点击量
待评议
点击量
下载量
评论
