TY - JOUR
T1 - Amidination of ligands for chemical and field-effect passivation stabilizes perovskite solar cells
AU - Yang, Yi
AU - Chen, Hao
AU - Liu, Cheng
AU - Xu, Jian
AU - Huang, Chuying
AU - Malliakas, Christos D.
AU - Wan, Haoyue
AU - Bati, Abdulaziz S.R.
AU - Wang, Zaiwei
AU - Reynolds, Robert P.
AU - Gilley, Isaiah W.
AU - Kitade, Shuta
AU - Wiggins, Taylor E.
AU - Zeiske, Stefan
AU - Suragtkhuu, Selengesuren
AU - Batmunkh, Munkhbayar
AU - Chen, Lin X.
AU - Chen, Bin
AU - Kanatzidis, Mercouri G.
AU - Sargent, Edward H.
PY - 2024/11/22
Y1 - 2024/11/22
N2 - Surface passivation has driven the rapid increase in the power conversion efficiency (PCE) of perovskite solar cells (PSCs). However, state-of-the-art surface passivation techniques rely on ammonium ligands that suffer deprotonation under light and thermal stress. We developed a library of amidinium ligands, of interest for their resonance effect-enhanced N-H bonds that may resist deprotonation, to increase the thermal stability of passivation layers on perovskite surfaces. This strategy resulted in a >10-fold reduction in the ligand deprotonation equilibrium constant and a twofold increase in the maintenance of photoluminescence quantum yield after aging at 85°C under illumination in air. Implementing this approach, we achieved a certified quasi-steady-state PCE of 26.3% for inverted PSCs; and we report retention of ≥90% PCE after 1100 hours of continuous 1-sun maximum power point operation at 85°C.
AB - Surface passivation has driven the rapid increase in the power conversion efficiency (PCE) of perovskite solar cells (PSCs). However, state-of-the-art surface passivation techniques rely on ammonium ligands that suffer deprotonation under light and thermal stress. We developed a library of amidinium ligands, of interest for their resonance effect-enhanced N-H bonds that may resist deprotonation, to increase the thermal stability of passivation layers on perovskite surfaces. This strategy resulted in a >10-fold reduction in the ligand deprotonation equilibrium constant and a twofold increase in the maintenance of photoluminescence quantum yield after aging at 85°C under illumination in air. Implementing this approach, we achieved a certified quasi-steady-state PCE of 26.3% for inverted PSCs; and we report retention of ≥90% PCE after 1100 hours of continuous 1-sun maximum power point operation at 85°C.
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U2 - 10.1126/science.adr2091
DO - 10.1126/science.adr2091
M3 - Article
C2 - 39571031
AN - SCOPUS:85210462153
SN - 0036-8075
VL - 386
SP - 898
EP - 902
JO - Science (New York, N.Y.)
JF - Science (New York, N.Y.)
IS - 6724
ER -
