Overcoming the Interface Losses in Planar Heterojunction Perovskite-Based Solar Cells.

Hou, Yi; Chen, Wei; Baran, Derya; Stubhan, Tobias; Luechinger, Norman A; Hartmeier, Benjamin; Richter, Moses; Min, Jie et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

A scalable, hysteresis-free and planar architecture perovskite solar cell is presented, employing a flame spray synthesized low-temperature processed NiO (LT-NiO) as hole-transporting layer yielding efficiencies close to 18%. Importantly, it is found that LT-NiO boosts the limits of open-circuit voltages toward an impressive non-radiative voltage loss of 0.226 V only, whereas PSS suffers from significant large non-radiative recombination losses.