The group of optoelectronic materials and devices are interested in developing semiconductor materials for optoelectronic devices, in particular halide perovskite materials. Halide perovskites have many interesting properties like high absorption coefficient, large charge carrier diffusion lengths, ease of synthesis, etc. However their real life applications are hindered due to the moisture instability and the lead toxicity. The group found zero­ dimensional perovskites to transform to 3D perovskites in the presence of moisture and remain to be stable under moist conditions, which lead to the stable perovskite solar cells. Since the transformation takes place in the presence of humidity, these were found to be useful in making self powered humidity sensors. To address the lead toxicity, the group is focussed on developing lead free perovskites and found that Cs2AgInCl6 doped with Bi3+ to be emitting a broad range with white light emission, making it a single source white light emitter.