Gharibzadeh Saba, Nejand Bahram Abdollahi, Moshaii Ahmad, Mohammadian Nasim, Alizadeh Amir Hossein, Mohammadpour Rahele, Ahmadi Vahid, Alizadeh Abdolali
Department of Physics, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
Nanomaterials Group, Dept. of Materials Engineering, Tarbiat Modares University, Tehran, Iran.
ChemSusChem. 2016 Aug 9;9(15):1929-37. doi: 10.1002/cssc.201600132. Epub 2016 Jun 30.
A simple and practical approach is introduced for the deposition of CuI as an inexpensive inorganic hole-transport material (HTM) for the fabrication of low cost perovskite solar cells (PSCs) by gas-solid phase transformation of Cu to CuI. The method provides a uniform and well-controlled CuI layer with large grains and good compactness that prevents the direct connection between the contact electrodes. Solar cells prepared with CuI as the HTM with Au electrodes displays an exceptionally high short-circuit current density of 32 mA cm(-2) , owing to an interfacial species formed between the perovskite and the Cu resulting in a long wavelength contribution to the incident photon-to-electron conversion efficiency (IPCE), and an overall power conversion efficiency (PCE) of 7.4 %. The growth of crystalline and uniform CuI on a low roughness perovskite layer leads to remarkably high charge extraction in the cells, which originates from the high hole mobility of CuI in addition to a large number of contact points between CuI and the perovskite layer. In addition, the solvent-free method has no damaging side effect on the perovskite layer, which makes it an appropriate method for large scale applications of CuI in perovskite solar cells.
介绍了一种简单实用的方法，通过铜气固相转变为碘化亚铜（CuI），将其作为一种廉价的无机空穴传输材料（HTM）用于制备低成本的钙钛矿太阳能电池（PSC）。该方法可提供具有大晶粒和良好致密性的均匀且可控的CuI层，防止接触电极之间的直接连接。以CuI作为HTM并搭配金电极制备的太阳能电池，由于在钙钛矿和铜之间形成了一种界面物质，导致对入射光子到电子转换效率（IPCE）有长波长贡献，显示出异常高的短路电流密度32 mA cm(-2) ，以及7.4%的整体功率转换效率（PCE）。在低粗糙度的钙钛矿层上生长结晶且均匀的CuI会导致电池中电荷提取显著提高，这源于CuI的高空穴迁移率以及CuI与钙钛矿层之间大量的接触点。此外，无溶剂方法对钙钛矿层没有破坏性副作用，这使其成为CuI在钙钛矿太阳能电池中大规模应用的合适方法。
