Perovskite Solar Cells with Inorganic Electron- and Hole-Transport Layers Exhibiting Long-Term (≈500 h) Stability at 85 °C under Continuous 1 Sun Illumination in Ambient Air

Seongrok Seo; Seonghwa Jeong; Changdeuck Bae; Nam-Gyu Park; Hyunjung Shin

doi:10.1002/adma.201801010

Perovskite Solar Cells with Inorganic Electron- and Hole-Transport Layers Exhibiting Long-Term (≈500 h) Stability at 85 °C under Continuous 1 Sun Illumination in Ambient Air

Adv Mater. 2018 May 22:e1801010. doi: 10.1002/adma.201801010. Online ahead of print.

Authors

Seongrok Seo¹, Seonghwa Jeong¹, Changdeuck Bae¹, Nam-Gyu Park², Hyunjung Shin¹

Affiliations

¹ Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
² School of Chemical Engineering, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.

PMID: 29786887
DOI: 10.1002/adma.201801010

Abstract

Despite the high power conversion efficiency (PCE) of perovskite solar cells (PSCs), poor long-term stability is one of the main obstacles preventing their commercialization. Several approaches to enhance the stability of PSCs have been proposed. However, an accelerating stability test of PSCs at high temperature under the operating conditions in ambient air remains still to be demonstrated. Herein, interface-engineered stable PSCs with inorganic charge-transport layers are shown. The highly conductive Al-doped ZnO films act as efficient electron-transporting layers as well as dense passivation layers. This layer prevents underneath perovskite from moisture contact, evaporation of components, and reaction with a metal electrode. Finally, inverted-type PSCs with inorganic charge-transport layers exhibit a PCE of 18.45% and retain 86.7% of the initial efficiency for 500 h under continuous 1 Sun illumination at 85 °C in ambient air with electrical biases (at maximum power point tracking).

Keywords: aluminum-doped zinc oxide; atomic layer deposition; halide; inorganic charge-transporting layer; perovskite solar cell; stability.