Journal
ADVANCED MATERIALS
Volume 30, Issue 29, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201801010
Keywords
aluminum-doped zinc oxide; atomic layer deposition; halide; inorganic charge-transporting layer; perovskite solar cell; stability
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Funding
- Ministry of Science, ICT and Future Planning (MSIP) of Korea through the National Research Foundation of Korea (NRF) [NRF-2017R1A4A1015770, NRF-2012M3A6A7054861, NRF-2016M3D1A1027664]
- National Research Foundation of Korea [2012M3A6A7054861, 2016M3D1A1027664] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 degrees C in ambient air with electrical biases (at maximum power point tracking).
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