Achieving Large‐Area Planar Perovskite Solar Cells by Introducing an Interfacial Compatibilizer

• DOI: 10.1002/adma.201606363
• Publication Date: 2017-04-10T12:33:17Z
• Authors: Jinho Lee; Hongkyu Kang; Geunjin Kim; Hyungcheol Back; Junghwan Kim; Soonil Hong; Byoungwook Park; Eunhag Lee; Kwanghee Lee
• Keywords: Dewetting

Despite the recent unprecedented increase in power conversion efficiencies (PCEs) of small-area devices (≤0.1 cm2 ), PCEs deteriorate drastically for PSCs larger areas because incomplete film coverage caused by dewetting hydrophilic perovskite precursor solutions on hydrophobic organic charge-transport layers (CTLs). Here, an innovative method fabricating scalable all types CTLs is reported. By introducing amphiphilic conjugated polyelectrolyte as interfacial compatibilizer, uniform films large-area substrates (18.4 ) and with total active area 6 (1 × unit cells) via a single-turn solution process successfully demonstrated. All cells exhibit highly 16.1 ± 0.9% (best PCE 17%), which highest value printable than 1 .