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In-Situ Luminescence Imaging of Perovskite Solar Cells Demonstrates Increasing Spatial Nonuniformity Upon Light-Soaking Degradation

Conference ·
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In this work we investigate degradation rates of triplecation mixed-halide perovskite p-i-n solar cells. We present an accelerated stress testing procedure using periodic blue light-soaking at elevated temperatures until devices reach ~80% of their initial efficiency. We track light-induced degradation via in-situ: photoluminescence (PL), current-voltage (I-V) curves, and transient photovoltage. Devices underwent 165 hours of light bias at 65degrees C. Results suggest that spatial uniformity in PL intensity decreases as device degradation increases. This investigation lays the groundwork to address the current gap in understanding the interplay between device performance and the evolution of macroscopic features in perovskite solar cells. Thus, we believe spatial characterization techniques will play a crucial role in the commercialization of perovskite solar cells.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE National Renewable Energy Laboratory (NREL)
DOE Contract Number:
AC36-08GO28308
OSTI ID:
2499500
Report Number(s):
NREL/CP-5K00-92676; MainId:94457; UUID:166a389b-988f-48c0-83a9-35f284ec75ef; MainAdminId:75710
Country of Publication:
United States
Language:
English

References (7)

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Theory of light-induced degradation in perovskite solar cells journal May 2020
Lateral ion migration accelerates degradation in halide perovskite devices journal January 2022
Modeling moisture ingress through polyisobutylene-based edge-seals: Polyisobutylene-based edge-seals
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journal January 2014
Analysis of degradation kinetics of halide perovskite solar cells induced by light and heat stress journal October 2022
Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction journal January 2020
Correlations between Electrochemical Ion Migration and Anomalous Device Behaviors in Perovskite Solar Cells journal February 2021

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Related Subjects

SOLAR ENERGY
imaging
perovskite
photoluminescence
reliability