Abstract
Solution coating of organohalide lead perovskites offers great potential for achieving low-cost manufacturing of large-area flexible optoelectronics. However, the rapid coating speed needed for industrial-scale production poses challenges to the control of crystal packing. Herein, this study reports using solution shearing to confine crystal nucleation and growth in large-area printed MAPbI3 thin films. Near single-crystalline perovskite microarrays are demonstrated with a high degree of controlled macroscopic alignment and crystal orientation, which exhibit significant improvements in optical and optoelectronic properties comparing with their random counterparts, spherulitic, and nanograined films. In particular, photodetectors based on the confined films showing intense anisotropy in charge transport are fabricated, and the device exhibits significantly improved performance in all aspects by one more orders of magnitude relative to their random counterparts. It is anticipated that perovskite films with controlled crystal packing may find applications in high-performance, large-area printed optoelectronics, and solar cells.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1700102 |
| Journal | Advanced Optical Materials |
| Volume | 5 |
| Issue number | 11 |
| DOIs | |
| State | Published - May 8 2017 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: J.L. and Y.L. contributed equally to this work. This work was supported by the fundamental Research Funds for the Central Universities (GK201603055 and GK01010), the Innovation Funds of Graduate Programs, SNNU (2015CXS047), the National University Research Fund (GK261001009 and GK201603107), the Changjiang Scholar and Innovative Research Team (IRT_14R33), the 111 Project (B14041), the National Key Research Program of China (2016YFA0202403), and the Chinese National 1000-talent-plan program (1110010341).