Title： | Conductive colloidal perovskite quantum dot inks towards fast printing of solar cells |
Authors： | Xuliang Zhang1,2, Hehe Huang1,2, Chenyu Zhao1,2, Lujie Jin1,3, Chihyung Lee4, Youyong Li1,3, Doo-Hyun Ko4, Wanli Ma1,3*, Tom Wu5 & Jianyu Yuan1,2* |
Institutions： | 1Institute of Functional Nano and Soft Materials, Soochow University, Suzhou, China. 2Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, China. 3Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, China. 4Department of Chemistry, Sungkyunkwan University, Suwon, Republic of Korea. 5Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, China. |
Abstract： | Quantum dot (QD) provides a versatile platform for high-throughput processing of semiconductors for large-area optoelectronic applications. Unfortunately, the QD solar cell is hampered by the time-consuming layer-by-layer process, a major challenge in manufacturing printable devices. Here we demonstrate a sequential acylation-coordination protocol including amine-assisted ligand removal and Lewis base-coordinated surface restoration to synthesize conductive APbI3 (A = formamidinium (FA), Cs or methylammonium) colloidal perovskite QD (PeQD) inks that enable one-step PeQD film deposition without additional solid-state ligand exchange. The resultant PeQD film displays uniform morphology with elevated electronic coupling, more ordered structure and homogeneous energy landscape. Narrow-bandgap FAPbI3 PeQD-based solar cells achieve a champion efficiency of 16.61% (certified 16.20%), exceeding the values obtained with other QD inks and layer-by-layer processes. The conductive PeQD inks are compatible with large-area device (9 × 9 cm2) fabrication using the blade-coating technique with a speed up to 50 mm s−1. |
IF： | 49.7 |
Link： | https://doi.org/10.1038/s41560-024-01608-5 Editor: Guo Jia |