Proceedings of Online Meetup - Beyond Lead Halide Perovskites: Syntheses and Applications of Metal Halide Semiconductors (MABP)
Publication date: 23rd April 2020
One of the most demanding materials in current research for both photovoltaic and lighting device applications is cesium lead halide perovskite, specifically CsPbI3.[1] However, it lacks its practical implementation due to Pb toxicity and phase-instability. Searching towards Pb-free perovskite is also need of time. Hence, one of the most effective protocol for reducing Pb content is the B-site doping with various metal ions in α-CsPbI3 which has also been proven to be a potential approach in bringing phase stability to these nanocrystals.[2] However, while the doping of various homovalent ions in replacing Pb(II) has been extensively studied, heterovalent doping was observed to be limited.[3] To understand the impact of heterovalent doping, Sb(III) was chosen here as an effective dopant for occupying the Pb(II) position in CsPbI3 nanocrystals. Importantly, it was observed that insertion of Sb(III) also stabilized the crystal phase of these red-emitting nanocrystals, but only with limited doping. However, with more intake, the cube shape turned to platelets and therefore also reduced the stability. Details of the insights of formation of these doped nanostructures are investigated, and further, these were implemented for photovoltaic application and comparable efficiency was recorded.
Special thanks to CSIR and DST for their financial support
Thanks to my supervisor, Prof. Narayan Pradhan
Thanks to Labmates and IACS
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