Publications by authors named "Chang En Tsai"
Article Synopsis
- Organic photovoltaics (OPVs) are nearing a power conversion efficiency of 19%, leading to a stronger focus on improving their long-term stability, which is crucial for practical applications.
- The study introduces graphene oxide nanosheets (GNS) modifications, including N-doped (N-GNS) and N,S-doped (NS-GNS), which enhance the OPVs' thermal and photostability by optimizing energy-level alignment and morphology.
- The NS-GNS device shows significant performance improvement (from 14.5% to 16.5% efficiency) and exceptional stability, with a lifespan of 2712 hours under heat and 2000 hours under light exposure, demonstrating its potential for durable solar energy solutions.
Halide perovskites have the potential to disrupt the photovoltaics market based on their high performance and low cost. However, the decomposition of perovskites under moisture, oxygen, and light raises concerns about service lifetime, especially because degradation mechanisms and the corresponding rate laws that fit the observed data have thus far eluded researchers. Here, we report a water-accelerated photooxidation mechanism dominating the degradation kinetics of archetypal perovskite CHNHPbI in air under >1% relative humidity at 25 °C.
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