The article discusses the development and performance of organometal trihalide perovskite solar cells on flexible polymer substrates. The authors demonstrate that a single thin film of the low-temperature solution-processed perovskite absorber, CH3NH3PbI3-xClx, can be sandwiched between organic contacts to achieve power conversion efficiencies of up to 10% on glass substrates and over 6% on flexible polymer substrates. This work removes barriers for the adoption of perovskite technology by the organic photovoltaic community, leveraging existing knowledge of hybrid interfaces for further improvements and flexible processing platforms. The study also explores the compatibility of different materials used in organic photovoltaics with the perovskite absorber, showing that PEDOT:PSS functions as an excellent hole acceptor in the inverted system. The results highlight the versatility of perovskite thin-film technology and its potential to compete with established solar technologies like crystalline silicon.The article discusses the development and performance of organometal trihalide perovskite solar cells on flexible polymer substrates. The authors demonstrate that a single thin film of the low-temperature solution-processed perovskite absorber, CH3NH3PbI3-xClx, can be sandwiched between organic contacts to achieve power conversion efficiencies of up to 10% on glass substrates and over 6% on flexible polymer substrates. This work removes barriers for the adoption of perovskite technology by the organic photovoltaic community, leveraging existing knowledge of hybrid interfaces for further improvements and flexible processing platforms. The study also explores the compatibility of different materials used in organic photovoltaics with the perovskite absorber, showing that PEDOT:PSS functions as an excellent hole acceptor in the inverted system. The results highlight the versatility of perovskite thin-film technology and its potential to compete with established solar technologies like crystalline silicon.