DOI: 10.1021/acsenergylett.6c02922 ISSN: 2380-8195
Colloidal ALD Epitaxial Shelling Enhances Stability and Photoluminescence of Blue Perovskite Nanocrystals
Gauri Sharma, Rahul Mahavir Varma, Shruti Singh, Suman Kundu, Rachna Singh, Rajdeep Das, Debarjya Ganguly, Ushita Roy, Rupam Ghosh, Sasank Pattnaik, Frans P. Widdershoven, Håkan Rensmo, Arindam Chowdhury, Sameer Sapra, Pralay K. SantraAbstract
A modified colloidal atomic layer deposition at room temperature grows a vacancy-ordered Cs2SnCl6 shell epitaxially on CsPbCl3 nanocrystals, avoiding the core degradation and parasitic shell nucleation that accompany high-temperature routes. The resulting core–shell nanocrystals achieve an absolute photoluminescence quantum yield of 62% and retain 65% of their emission after six months of ambient storage and 30% after 48 h of exposure to added water.