Efficient and Air-Stable Mixed-Cation Lead Mixed-Halide Perovskite Solar Cells with n-Doped Organic Electron Extraction Layers.

Wang, Zhiping; McMeekin, David P; Sakai, Nobuya; van Reenen, Stephan; Wojciechowski, Konrad; Patel, Jay B; Johnston, Michael B; Snaith, Henry J · Adv Mater · 2017

basic_science · Level V

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Abstract

Air-stable doping of the n-type fullerene layer in an n-i-p planar heterojunction perovskite device is capable of enhancing device efficiency and improving device stability. Employing a (HC(NH<sub>2</sub> )<sub>2</sub> )<sub>0.83</sub> Cs<sub>0.17</sub> Pb(I<sub>0.6</sub> Br<sub>0.4</sub> )<sub>3</sub> perovskite as the photoactive layer, glass-glass laminated devices are reported, which sustain 80% of their "post burn-in" efficiency over 3400 h under full sun illumination in ambient conditions.