Improving the barrier properties of tin oxide in metal halide perovskite solar cells using ozone to enhance nucleation
- University of Colorado, Boulder, CO (United States)
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- National Renewable Energy Laboratory (NREL), Golden, CO (United States); University of Colorado, Boulder, CO (United States)
- University of Colorado, Boulder, CO (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Here we investigate tin oxide growth on fullerene (C60) by atomic layer deposition (ALD) for C60/oxide bilayer electron selective contacts in P-I-N metal halide perovskite (MHP) solar cells. An in situ ozone functionalization step is incorporated in an ALD SnOx process to suppress sub-surface growth, leading to improved internal barrier performance of ALD SnOx thin films grown on fullerene surfaces. We show that this approach decreases the water-vapor transmission rate of C60/ALD SnOx barriers by an order of magnitude and improves the barrier properties against gas, solvent, and halide migration. Furthermore, ozone-treated SnOx barriers can narrow photovoltaic performance distribution without compromising efficiency. We demonstrate the universality of this approach in wide-, intermediate-, and low-gap perovskite systems and further show that enhancement of the ALD barrier layer is critical toward improving the yield of all-perovskite tandem solar cells. Two-terminal all-perovskite tandem solar cells incorporating ozone nucleation are reported at over 24% photovoltaic conversion efficiency.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- Colorado Shared Instrumentation in Nanofabrication and Characterization (COSINC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
- Grant/Contract Number:
- AC36-08GO28308; EE0008551; EE0009513
- OSTI ID:
- 2280790
- Report Number(s):
- NREL/JA--5K00-84908; MainId:85681; UUID:ed93fb3e-04bf-4e1f-8d34-3a12bb65802e; MainAdminID:70973
- Journal Information:
- Joule, Journal Name: Joule Journal Issue: 12 Vol. 7; ISSN 2542-4351
- Publisher:
- Elsevier - Cell PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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