TY - JOUR
T1 - Deterministic fabrication of 3D/2D perovskite bilayer stacks for durable and efficient solar cells
AU - Sidhik, Siraj
AU - Wang, Yafei
AU - De Siena, Michael
AU - Asadpour, Reza
AU - Torma, Andrew J.
AU - Terlier, Tanguy
AU - Ho, Kevin
AU - Li, Wenbin
AU - Puthirath, Anand B.
AU - Shuai, Xinting
AU - Agrawal, Ayush
AU - Traore, Boubacar
AU - Jones, Matthew
AU - Giridharagopal, Rajiv
AU - Ajayan, Pulickel M.
AU - Strzalka, Joseph
AU - Ginger, David S.
AU - Katan, Claudine
AU - Alam, Muhammad Ashraful
AU - Even, Jacky
AU - Kanatzidis, Mercouri G.
AU - Mohite, Aditya D.
N1 - Publisher Copyright:
Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.
PY - 2022/9/23
Y1 - 2022/9/23
N2 - Realizing solution-processed heterostructures is a long-enduring challenge in halide perovskites because of solvent incompatibilities that disrupt the underlying layer. By leveraging the solvent dielectric constant and Gutmann donor number, we could grow phase-pure two-dimensional (2D) halide perovskite stacks of the desired composition, thickness, and bandgap onto 3D perovskites without dissolving the underlying substrate. Characterization reveals a 3D–2D transition region of 20 nanometers mainly determined by the roughness of the bottom 3D layer. Thickness dependence of the 2D perovskite layer reveals the anticipated trends for n-i-p and p-i-n architectures, which is consistent with band alignment and carrier transport limits for 2D perovskites. We measured a photovoltaic efficiency of 24.5%, with exceptional stability of T99 (time required to preserve 99% of initial photovoltaic efficiency) of >2000 hours, implying that the 3D/2D bilayer inherits the intrinsic durability of 2D perovskite without compromising efficiency.
AB - Realizing solution-processed heterostructures is a long-enduring challenge in halide perovskites because of solvent incompatibilities that disrupt the underlying layer. By leveraging the solvent dielectric constant and Gutmann donor number, we could grow phase-pure two-dimensional (2D) halide perovskite stacks of the desired composition, thickness, and bandgap onto 3D perovskites without dissolving the underlying substrate. Characterization reveals a 3D–2D transition region of 20 nanometers mainly determined by the roughness of the bottom 3D layer. Thickness dependence of the 2D perovskite layer reveals the anticipated trends for n-i-p and p-i-n architectures, which is consistent with band alignment and carrier transport limits for 2D perovskites. We measured a photovoltaic efficiency of 24.5%, with exceptional stability of T99 (time required to preserve 99% of initial photovoltaic efficiency) of >2000 hours, implying that the 3D/2D bilayer inherits the intrinsic durability of 2D perovskite without compromising efficiency.
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U2 - 10.1126/science.abq7652
DO - 10.1126/science.abq7652
M3 - Article
C2 - 36137050
AN - SCOPUS:85138399397
SN - 0036-8075
VL - 377
SP - 1425
EP - 1430
JO - Science
JF - Science
IS - 6613
ER -