Highly stable, luminescent core–shell type methylammonium–octylammonium lead bromide layered perovskite nanoparticles
2016
Bhaumik, Saikat | Veldhuis, Sjoerd A. | Ng, Yan Fong | Li, Mingjie | Muduli, Subas Kumar | Sum, T. C. (Tze-Chien) | Damodaran, Bahulayan | Mhaisalkar, S. (Subodh) | Mathews, Nripan
A new protocol for the synthesis of a highly stable (over 2 months under ambient conditions) solution-processed core–shell type structure of mixed methylammonium–octylammonium lead bromide perovskite nanoparticles (5–12 nm), having spherical shape, color tunability in the blue to green spectral region (438–521 nm) and a high photoluminescence quantum yield (PLQY) of up to 92% is described. The color tunability, high PLQY and stability are due to the quantum confinement imparted by the crystal engineering associated with core–shell nanoparticle formation during growth.
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