Emerging solar cells, namely, organic solar cells and perovskite solar cells, are the thin‐film photovoltaics that have light to electricity conversion efficiencies close to that of silicon solar cells while possessing advantages in having additional functionalities, facile‐processability, and low fabrication cost. To maximize these advantages, the electrode components must be replaced by materials that are more flexible and cost‐effective. Researchers around the globe have been looking for the new electrodes that meet these requirements. Among many candidates, single‐walled carbon nanotubes have demonstrated their feasibility as the new alternative to conventional electrodes, such as indium tin oxide and metals. This review discusses various growth methods of single‐walled carbon nanotubes and their electrode applications in thin‐film photovoltaics. Single‐walled carbon nanotube electrodes in organic solar cells and perovskite solar cells are reviewed from a synthesis and applications point of views. The emerging thin‐film solar cells have the potential to become next‐generation flexible and portable energy devices. Replacement of conventional electrodes by single‐walled carbon nanotubes is crucial in achieving such devices.