Dr. Deepa’s group is engaged in the development and architecture of novel materials and devices for sustainable energy. Studies are being carried out on cost-effective, air-stable and eco-friendly perovskite materials for high efficiency photovoltaics. Carrier selective contact-based silicon heterojunction, with the advantages of easy fabrication and cost-effectiveness compared to the conventional Si solar cell, is also another area of research. The group is also interested in developing Flexible Electrochromic Smart Film that could be applied over the surface of normal glass which will enable dynamic modulation of light. Such electrochromic windows are said to reduce the overall energy demand by an average of 20% and the peak energy demand up to 30%. These smart windows can fetch very good monetary and energy saving benefits and also achieve long term sustainability goals. In addition, p-type transparent conducting materials are grown for the realization of Invisible Electronics with applications in solar cells, solid state sensors, flat panel displays, touch screens, automobiles, light emitting diodes, smart-windows, thin film transistors and photocathodes in water-splitting. Also novel materials for visible light assisted Photocatalysis, which aid in the purification of water, are being explored by Dr. Deepa’s group. The research aims to decontaminate large volumes of industrial waste water containing dye and other organic pollutants harmful to the environment.