Oku Takeo, Ohishi Yuya, Ueoka Naoki
Department of Materials Science, The University of Shiga Prefecture 2500 Hassaka Hikone Shiga 522-8533 Japan
RSC Adv. 2018 Mar 15;8(19):10389-10395. doi: 10.1039/c7ra13582c. eCollection 2018 Mar 13.
The effects of adding NHCl an air blow process on CHNHPbI(Cl) perovskite solar cells were investigated. CHNHPbI(Cl) solar cells containing various amounts of NHCl were fabricated by spin-coating. The microstructures of the resulting cells were investigated by X-ray diffraction, optical microscopy, and scanning electron microscopy. The current density-voltage characteristics of the cell were improved by adding an appropriate amount of NHCl and air blowing, which increased the photoconversion efficiency to 14%. Microstructure analysis indicated that the perovskite layer contained dense grains with strong (100) orientation, as a result of NHCl addition and air blowing. The ratio of the (100)/(210) reflection intensities for the perovskite crystals was 2000 times higher than that of randomly oriented grains. The devices were stable when stored in ambient air for two weeks.
研究了添加NH₄Cl和吹气工艺对CH₃NH₃PbI₃(Cl)钙钛矿太阳能电池的影响。通过旋涂制备了含有不同量NH₄Cl的CH₃NH₃PbI₃(Cl)太阳能电池。通过X射线衍射、光学显微镜和扫描电子显微镜对所得电池的微观结构进行了研究。通过添加适量的NH₄Cl和吹气，电池的电流密度-电压特性得到改善，光转换效率提高到了14%。微观结构分析表明，由于添加了NH₄Cl和吹气，钙钛矿层包含具有强烈(100)取向的致密晶粒。钙钛矿晶体的(100)/(210)反射强度比是随机取向晶粒的2000倍。这些器件在环境空气中储存两周时是稳定的。
