论文部分内容阅读
分别将银纳米相溶胶(银纳米颗粒、Ag@SiO_2核壳结构、银纳米线)掺入氧化铝异丙醇溶液中制成具有蜂窝结构的介孔层材料,然后在介孔层表面制备CH_3NH_3Pb I3钙钛矿吸收层得到Al_2O_3/CH_3NH_3Pb I3复合薄膜,并对复合膜的微观结构、光吸收特性及太阳电池器件性能进行了测试和分析。研究表明,Al_2O_3/CH_3NH_3Pb I3复合膜与CH_3NH_3Pb I3在可见光区域吸收光谱基本相同,含量极少的Al_2O_3对CH_3NH_3Pb I3吸光性能影响较小。而掺入银纳米相可明显改善CH_3NH_3Pb I3钙钛矿薄膜的吸收性能。当银纳米颗粒、Ag@SiO_2核壳结构和银纳米线相对浓度比分别为0.15、0.3及0.15时,CH_3NH_3Pb I3吸光性能分别达到最佳;银纳米相浓度继续增大时,薄膜的光吸收性能逐渐减弱。此外,掺入Ag@SiO_2核壳结构可使钙钛矿薄膜太阳电池光电转换效率由6.28%增大到7.09%,而银纳米颗粒和银纳米线由于会增大太阳电池内部载流子传输路径,提高电子空穴对复合效率,最终反而降低了太阳电池短路电流密度和光电转换效率。
The silver nanocomposite (silver nanoparticles, Ag @ SiO_2 core-shell structure, silver nanowires) were doped into alumina isopropanol solution to form a mesoporous material with a honeycomb structure, and then prepared on the surface of the mesoporous layer CH_3NH_3Pb I3 perovskite layer to obtain Al 2 O 3 / CH 3 NH 3 Pb 3 composite films. The microstructure, light absorption properties and solar cell performance of the composite films were tested and analyzed. The results show that the absorption spectra of Al_2O_3 / CH_3NH_3Pb I3 composite film and CH_3NH_3Pb I3 are almost the same in the visible light region, while Al_2O_3 with little content has little effect on the light absorption of CH_3NH_3Pb I3. The incorporation of silver nano-phase can significantly improve the absorption of CH_3NH_3Pb I3 perovskite film. When the relative concentration ratios of silver nanoparticles, Ag @ SiO_2 core-shell structure and silver nanowires were 0.15, 0.3 and 0.15, respectively, the absorption properties of CH_3NH_3Pb I3 reached the best respectively. When the concentration of Ag nanophase continued to increase, the light absorption Gradually weakened. In addition, the incorporation of Ag @ SiO_2 core-shell structure can make the photoelectric conversion efficiency of perovskite thin film solar cells increased from 6.28% to 7.09%, while the silver nanoparticles and silver nanowires due to increased solar cell internal carrier transport path , Improve the electron-hole recombination efficiency, but ultimately reduce the solar cell short-circuit current density and photoelectric conversion efficiency.