TY - JOUR
T1 - Self-Crystallized Multifunctional 2D Perovskite for Efficient and Stable Perovskite Solar Cells
AU - Kim, Hobeom
AU - Pei, Mingyuan
AU - Lee, Yonghui
AU - Sutanto, Albertus A.
AU - Paek, Sanghyun
AU - Queloz, Valentin I.E.
AU - Huckaba, Aron J.
AU - Cho, Kyung Taek
AU - Yun, Hyung Joong
AU - Yang, Hoichang
AU - Nazeeruddin, Mohammad Khaja
N1 - Publisher Copyright:
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Recently, perovskite solar cells (PSC) with high power-conversion efficiency (PCE) and long-term stability have been achieved by employing 2D perovskite layers on 3D perovskite light absorbers. However, in-depth studies on the material and the interface between the two perovskite layers are still required to understand the role of the 2D perovskite in PSCs. Self-crystallization of 2D perovskite is successfully induced by deposition of benzyl ammonium iodide (BnAI) on top of a 3D perovskite light absorber. The self-crystallized 2D perovskite can perform a multifunctional role in facilitating hole transfer, owing to its random crystalline orientation and passivating traps in the 3D perovskite. The use of the multifunctional 2D perovskite (M2P) leads to improvement in PCE and long-term stability of PSCs both with and without organic hole transporting material (HTM), 2,2′,7,7′-tetrakis-(N,N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (spiro-OMeTAD) compared to the devices without the M2P.
AB - Recently, perovskite solar cells (PSC) with high power-conversion efficiency (PCE) and long-term stability have been achieved by employing 2D perovskite layers on 3D perovskite light absorbers. However, in-depth studies on the material and the interface between the two perovskite layers are still required to understand the role of the 2D perovskite in PSCs. Self-crystallization of 2D perovskite is successfully induced by deposition of benzyl ammonium iodide (BnAI) on top of a 3D perovskite light absorber. The self-crystallized 2D perovskite can perform a multifunctional role in facilitating hole transfer, owing to its random crystalline orientation and passivating traps in the 3D perovskite. The use of the multifunctional 2D perovskite (M2P) leads to improvement in PCE and long-term stability of PSCs both with and without organic hole transporting material (HTM), 2,2′,7,7′-tetrakis-(N,N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (spiro-OMeTAD) compared to the devices without the M2P.
KW - 2D perovskites
KW - hole-transfer facilitators
KW - hole-transporting layers
KW - perovskite solar cells
KW - trap passivation
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U2 - 10.1002/adfm.201910620
DO - 10.1002/adfm.201910620
M3 - Article
AN - SCOPUS:85081310663
SN - 1616-301X
VL - 30
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 19
M1 - 1910620
ER -