TY - JOUR AU - Yang, Xiaokun AU - Yang, Ji AU - Khan, Jahangeer AU - Deng, Hui AU - Yuan, Shengjie AU - Zhang, Jian AU - Xia, Yong AU - Deng, Feng AU - Zhou, Xue AU - Umar, Farooq AU - Jin, Zhixin AU - Song, Haisheng AU - Cheng, Chun AU - Sabry, Mohamed AU - Tang, Jiang PY - 2020/01/24 Y2 - 2024/03/28 TI - Hydroiodic Acid Additive Enhanced the Performance and Stability of PbS-QDs Solar Cells via Suppressing Hydroxyl Ligand JF - Nano-Micro Letters JA - Nano-Micro Lett VL - 12 IS - SE - Articles DO - 10.1007/s40820-020-0372-z UR - https://www.nmlett.org/index.php/nml/article/view/520 SP - 37 AB - <p>The recent emerging progress of quantum dot ink (QD-ink) has overcome the complexity of multiple-step colloidal QD (CQD) film preparation and pronouncedly promoted the device performance. However, the detrimental hydroxyl (OH) ligands induced from synthesis procedure have not been completely removed. Here, a halide ligand additive strategy was devised to optimize QD-ink process. It simultaneously reduced sub-bandgap states and converted them into iodide-passivated surface, which increase carrier mobility of the QDs films and achieve thicker absorber with improved performances. The corresponding power conversion efficiency of this optimized device reached 10.78%. (The control device was 9.56%.) Therefore, this stratege can support as a candidate strategy to solve the QD original limitation caused by hydroxyl ligands, which is also compatible with other CQD-based optoelectronic devices.</p><p>Highlights:</p><p>1 The hydroiodic acid was explored systematically to modify PbS quantum dots (QDs) ink process, which could remove trap states by hydroxyl ligand and improve iodine passivation on the PbS-QDs surface.<br>2 This strategy solved the essential question of PbS-QDs ink process and showed the favorable application prospects in QDs technology.</p> ER -