TY - JOUR AU - Zhou, Xuesong AU - Qiu, Lele AU - Fan, Ruiqing AU - Zhang, Jian AU - Hao, Sue AU - Yang, Yulin PY - 2020/03/28 Y2 - 2024/03/29 TI - Heterojunction Incorporating Perovskite and Microporous Metal–Organic Framework Nanocrystals for Efficient and Stable Solar Cells JF - Nano-Micro Letters JA - Nano-Micro Lett VL - 12 IS - SE - Articles DO - 10.1007/s40820-020-00417-1 UR - https://www.nmlett.org/index.php/nml/article/view/477 SP - 80 AB - <p>In this paper, we present a facile approach to enhance the efficiency and stability of perovskite solar cells (PSCs) by incorporating perovskite with microporous indium-based metal–organic framework [In<sub>12</sub>O(OH)<sub>16</sub>(H<sub>2</sub>O)<sub>5</sub>(btc)<sub>6</sub>]<sub>n</sub> (In-BTC) nanocrystals and forming heterojunction light-harvesting layer. The interconnected micropores and terminal oxygen sites of In-BTC allow the preferential crystallization of perovskite inside the regular cavities, endowing the derived films with improved morphology/crystallinity and reduced grain boundaries/defects. Consequently, the In-BTC-modified PSC yields enhanced fill factor of 0.79 and power conversion efficiency (PCE) of 20.87%, surpassing the pristine device (0.76 and 19.52%, respectively). More importantly, over 80% of the original PCE is retained after 12&nbsp;days of exposure to ambient environment (25&nbsp;°C and relative humidity of ~ 65%) without encapsulation, while only about 35% is left to the pristine device.</p><p>Highlights:</p><p>1 Microporous indium-based metal–organic framework (In-BTC) nanocrystals are synthesized under an extremely mild condition.<br>2 Perovskite/In-BTC heterojunction films possess improved morphology/crystallinity and reduced grain boundaries/defects.<br>3 In-BTC-modified perovskite solar cells exhibit significantly enhanced efficiency of 20.87% and long-term stability.</p> ER -