TY - JOUR
T1 - Towards Linking Lab and Field Lifetimes of Perovskite Solar Cells
AU - Jiang, Qi
AU - Tirawat, Robert
AU - Kerner, Ross
AU - Gaulding, E.
AU - Xian, Yeming
AU - Wang, Xiaoming
AU - Newkirk, Jimmy
AU - Yan, Yanfa
AU - Berry, Joseph
AU - Zhu, Kai
PY - 2023
Y1 - 2023
N2 - Metal halide perovskite solar cells (PSCs) represent a promising low-cost, thin-film photovoltaic (PV) technology, with unprecedented power conversion efficiencies (PCEs) obtained for both single-junction and tandem applications1-8. To push PSCs toward commercialization, it is critical, albeit challenging, to understand device reliability under real-world outdoor conditions where multiple stress factors (e.g., light, heat, humidity) coexist, generating complicated degradation behaviors9-13. It is necessary to identify accelerated indoor testing protocols - which can correlate specific stressors with observed degradation modes in fielded devices - to quickly guide PSC development. Here, we use a state-of-the-art p-i-n PSC stack (with PCE up to ~25.5%) to show that indoor accelerated stability tests can predict our 6-month outdoor aging tests. Device degradation rates under illumination and at elevated temperatures are most instructive for understanding outdoor device reliability. We also find that the indium tin oxide (ITO)/self-assembled monolayer (SAM)-based hole transport layer (HTL)/perovskite interface most strongly affects our device operation stability. Improving the ion-blocking properties of the SAM HTL increases averaged device operational stability at 50 degree C-85 degree C by a factor of ~2.8, reaching over 1000 h at 85 degree C and to near 8200 h at 50 degree C with a projected 20% degradation, which is among the best to date for high-efficiency p-i-n PSCs14-17.
AB - Metal halide perovskite solar cells (PSCs) represent a promising low-cost, thin-film photovoltaic (PV) technology, with unprecedented power conversion efficiencies (PCEs) obtained for both single-junction and tandem applications1-8. To push PSCs toward commercialization, it is critical, albeit challenging, to understand device reliability under real-world outdoor conditions where multiple stress factors (e.g., light, heat, humidity) coexist, generating complicated degradation behaviors9-13. It is necessary to identify accelerated indoor testing protocols - which can correlate specific stressors with observed degradation modes in fielded devices - to quickly guide PSC development. Here, we use a state-of-the-art p-i-n PSC stack (with PCE up to ~25.5%) to show that indoor accelerated stability tests can predict our 6-month outdoor aging tests. Device degradation rates under illumination and at elevated temperatures are most instructive for understanding outdoor device reliability. We also find that the indium tin oxide (ITO)/self-assembled monolayer (SAM)-based hole transport layer (HTL)/perovskite interface most strongly affects our device operation stability. Improving the ion-blocking properties of the SAM HTL increases averaged device operational stability at 50 degree C-85 degree C by a factor of ~2.8, reaching over 1000 h at 85 degree C and to near 8200 h at 50 degree C with a projected 20% degradation, which is among the best to date for high-efficiency p-i-n PSCs14-17.
KW - accelerated lifetime test
KW - activation energy
KW - outdoor stability
KW - perovskite solar cells
KW - stability
UR - http://www.scopus.com/inward/record.url?scp=85173888676&partnerID=8YFLogxK
U2 - 10.1038/s41586-023-06610-7
DO - 10.1038/s41586-023-06610-7
M3 - Article
SN - 0028-0836
VL - 623
SP - 313
EP - 318
JO - Nature
JF - Nature
ER -