Fully Solution-Processed n-i-p-Like Perovskite Solar Cells with Planar Junction: How the Charge Extracting Layer Determines the Open-Circuit Voltage.

Tao, Chen; Van Der Velden, Jeroen; Cabau, Lydia; Montcada, Nuria F; Neutzner, Stefanie; Srimath Kandada, Ajay Ram; Marras, Sergio; Brambilla, Luigi et al. · Adv Mater · 2017

basic_science · Level V

Where this comes from

Abstract

Fully solution-processed direct perovskite solar cells with a planar junction are realized by incorporating a cross-linked [6,6]-phenyl-C61-butyric styryl dendron ester layer as an electron extracting layer. Power conversion efficiencies close to 19% and an open-circuit voltage exceeding 1.1 V with negligible hysteresis are delivered. A perovskite film with superb optoelectronic qualities is grown, which reduces carrier recombination losses and hence increases V <sub>oc</sub> .