For perovskite-based indoor photovoltaics (IPVs) to be competitive candidates for low-power consumption electronic devices, fully solution-processed fabrication protocols will have to be established in order to enable roll-to-roll compatible manufacture.
Researchers from East China University of Science and Technology, Shanghai Jiao Tong University, Nanjing University and Zhejiang University have reported blade-coated perovskite IPV devices developed by blade-coating high-quality hole and electron transporting layers through solvent and morphology engineering, respectively. A uniform hole-transporting layer of polymeric carbazole phosphonic acid was achieved by tuning the properties co-solvent system, while a compact electron-transporting layer of poly(fullerene-alt-xylene) was realized by adjusting the morphology of the underlying perovskite layer.
The blade-coated cells (6.84 mm2) and mini-modules (10.4 cm2) achieved impressive efficiencies of 31.8% and 24.0%, respectively, under 1000 lux LED illumination (4000 K), retaining over 80% PCE of control devices fabricated by spin-coating and thermal evaporation.
This work addresses the key challenges in scalable solution-processed perovskite IPV production, offering a pathway to transition from lab research to industrial production.
