Low-cost printed flexible solar cells as substitute for current (1st and 2nd generation) photovoltaics for building integrated applications in India Climate change and the 'energy trilemma' (sustainability, security, equity) are global challenges that effect us all, but most of all, the populations of developing countries.  India in particular has a currently unsustainable energy system that causes extreme pollution, is unreliable and unaffordable for many average people.  the Indian Government is working incredibly hard to address these challenges and has set an ambitious target to generate 57% of India's energy from renewables by 2027.  This project aims to contribute to these target by developing a solar energy product that is low-cost to manufacture in terms of set up costs, materials and energy consumption. The project will use well understood printing processes to scale-up recent advances in perovskite photovoltaic (PV) research to produce prototype, building integrated solar energy products tested to industry standards.  Working in collaboration with a leading UK company of building integrated photovoltaics and an Indian cleantech finance firm, the project will transfer the innovation to the context of India where it can be locally manufactured and deployed in accordance with the Indian Government initiative of 'Make in India'. It is the goal of the project to create one or more new ventures in India to complete the local supply-chain required to successfully bring the product to market, creating jobs and economic growth in the region. The Global Challenges Research Fund (GCRF) supports cutting-edge research to address challenges faced by developing countries. The fund addresses the UN sustainable development goals. It aims to maximise the impact of research and innovation to improve lives and opportunity in the developing world.