Ultralightweight Perovskite Solar Cells with 30W/g Specific Weight
Sprache des Vortragstitels:
2015 MRS Spring Meeting & Exhibit
Sprache des Tagungstitel:
Flexibility, compliance and weight will turn out to be key metrics for future electronic appliances and power supplies. Imperceptible plastic electronic wraps integrate nanometer thin film active components on sub-2-?m polymer foils and create devices unmatched in mechanical flexibility, stretchability and weight.
Organometallic halide perovskites are capable of delivering very high power per weight when fabricated on ultrathin substrates, an important metric for wearable and ultraportable electronics, for remote sensing or for space applications.
Here we demonstrate methods to fabricate perovskite solar cells on 1.4?m thick PET substrates with 12% power conversion efficiency and a record high solar cell specific weight of 30W/g. The solar cells are less than 2?m in total thickness and can be bent into radii smaller than 50?m. Our devices are fabricated from solution in ambient air at temperatures below 120°C to ensure process compatibility with ultrathin polymer foil substrates. Their unique mechanical properties are achieved with an all ITO/FTO free device architecture that does not require titanium oxide interlayers and avoids high sintering temperatures typically employed for rigid devices on glass substrates. These potentially low cost power sources conform to arbitrary shapes and are expected to provide electrical energy wherever high specific power is critical, as in next generation ultra light portables, wearables, small-scale autonomous robots or space technologies.
The authors acknowledge funding from the Wittgenstein award and the ERC advanced investigators grant ?Soft Map?.