Wednesday, May 31, 2017

ALD barrier improves stability of perovskite quantum dots

EPFL Reports: A new approach to stabilize perovskite quantum dots has been developed in the lab of Raffaella Buonsanti at EPFL Valais Wallis. ALD was used to encapsulate the perovskite quantum dots with an amorphous alumina matrix, which acts as a gas and ion diffusion barrier making the quantum dots more robust against air, light, heat, and moisture.

Reference paper: A. Loiudice, S. Saris, E. Oveisi, D. T. L. Alexander, R. Buonsanti. CsPbBr3 QD/AlOx inorganic nanocomposites with exceptional stability in water, light and heat. Angewandte Chemie 26 May 2017. DOI: 10.1002/anie.201703703

According to the publication an Ultratech/CNT Savannah 200 ALD was used to process the Al2O3 barrier. Please fin all the details in the supporting information (LINK) as well as a movie showing the accelerated test in a water bath (LINK)