Improved performance of perovskite solar cell by controlling CHb class="a-plus-plus">3b>NHb class="a-plus-plus">3b>PbIb class="a-plus-plus">3−xb>Clb class="a-plus-plus">xb> film morphology with CHb class="a-plus-plus">3b>NHb class="a-plus-plus">3b>Cl-assisted method

详细信息    查看全文

• 作者：B. G. Zhao ; L. Zhu ; Y. L. Zhao ; Y. Yang…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：27
• 期：10
• 页码：10869-10876
• 全文大小：2,568 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry<br>Optical and Electronic Materials<br>Characterization and Evaluation Materials<br>
• 出版者：Springer New York
• ISSN：1573-482X
• 卷排序：27

文摘

Sequential deposition solution-based method has been widely used for the fabrication of perovskite solar cells (PSCs). However, there is still a challenge to achieve homogeneous and consecutive surface of the perovskite layers. In this work, CHb>3b>NHb>3b>PbIb>3−xb>Clb>xb> layers were prepared by a modified two-step solution method. Specifically, the optimum amount of CHb>3b>NHb>3b>Cl pre-added into PbIb>2b> precursor solution, the appropriate size of pinholes and voids appear in PbIb>2b> films and leave room for the growth of CHb>3b>NHb>3b>PbIb>3−xb>Clb>xb> crystal. Under this condition, the crystal grains size is diminished and the surface coverage ratio of CHb>3b>NHb>3b>PbIb>3−xb>Clb>xb> film is enhanced, which prevent the combination of electron-hole pairs on the interface between perovskite layer and TiOb>2b> substrate. By varying the CHb>3b>NHb>3b>Cl amounts, the PSC devices displayed the highest power conversion efficiency of 13 %, which was obviously higher than that of the one prepared via transitional routes (10.32 %). As a result, we developed a simple and repeatable route for controllable synthesis of perovskite absorption layers, which is demonstrated to be effective to improve the performance of PSCs.