The lifetime and stability of flexible photovoltaic (PV) devices are crucial factors in the production of sustainable and eco-friendly energy. However, flexible PV devices are usually constructed with a thin active material integrated onto a soft substrate, the surfaces of which are prone to moisture and heat damage, making devices unreliable in terms of their lifetime and stability. Here, we built flexible InGaP/GaAs tandem solar cells with an ultrathin thermally grown silicon dioxide layer as a permanent water barrier and an antireflection coating (ARC). By transferring an ultrathin thermally grown silicon dioxide onto flexible InGaP/GaAs tandem solar cells, there was no performance degradation even after soaking the solar cells in water at 70 °C for 10 days. Furthermore, the energy conversion efficiency of the solar cell with a thermally grown silicon dioxide layer was improved by 2.24% due to antirefletion effect compared with that of the solar cells without the silicon dioxide layer. Such device technology establishes a stable energy source not only for vehicles, satellites, and drones exposed to harsh environments but also for underwater operating systems and sensors.
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All Science Journal Classification (ASJC) codes
- Chemical Engineering (miscellaneous)
- Energy Engineering and Power Technology
- Materials Chemistry
- Electrical and Electronic Engineering