Highly stable, luminescent core–shell type methylammonium–octylammonium lead bromide layered perovskite nanoparticles

• Main Authors: Bhaumik, Saikat, Veldhuis, Sjoerd A., Ng, Yan Fong, Li, Mingjie, Muduli, Subas Kumar, Sum, Tze Chien, Damodaran, Bahulayan, Mhaisalkar, Subodh, Mathews, Nripan
• Other Authors: School of Materials Science and Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Materials; Core-shell Perovskite Nanoparticles; Bromide
• Online Access: https://hdl.handle.net/10356/140846
• Institution: Nanyang Technological University

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.