Tailoring of Electron-Collecting Oxide Nanoparticulate Layer for Flexible Perovskite Solar Cells.
Low-temperature-processed perovskite solar cells (PSCs), especially those fabricated on flexible substrates, exhibit device performance that is worse than that of high-temperature-processed PSCs. One of the main reasons for the inferior performance of low-temperature-processed PSCs is the loss of photogenerated electrons in the electron collection layer (ECL) or related interfaces, i.e., indium tin oxide/ECL and ECL/perovskite. Here, we report that tailoring of the energy level and electron transporting ability in oxide ECLs using Zn2SnO4 nanoparticles and quantum dots notably minimizes the loss of photogenerated electrons in the low-temperature-fabricated flexible PSC. The proposed ECL with methylammonium lead halide [MAPb(I0.9Br0.1)3] leads to fabrication of significantly improved flexible PSCs with steady-state power conversion efficiency of 16.0% under AM 1.5G illumination of 100 mW cm(-2) intensity. These results provide an effective method for fabricating high-performance, low-temperature solution-processed flexible PSCs.
Division of Advanced Materials, Korea Research Institute of Chemical Technology , 4 Gajeong-Ro, Yuseong-Gu, Daejeon 305-600, Korea.|Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.
Seong Sik
SS
Shin
Division of Advanced Materials, Korea Research Institute of Chemical Technology , 4 Gajeong-Ro, Yuseong-Gu, Daejeon 305-600, Korea.|School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 689-798, Korea.
Woon Seok
WS
Yang
Division of Advanced Materials, Korea Research Institute of Chemical Technology , 4 Gajeong-Ro, Yuseong-Gu, Daejeon 305-600, Korea.|Department of Energy Science, Sungkyunkwan University , 2066 Seoburo, Jangan-gu, Suwon 440-746, Republic of Korea.
Eun Joo
EJ
Yeom
Division of Advanced Materials, Korea Research Institute of Chemical Technology , 4 Gajeong-Ro, Yuseong-Gu, Daejeon 305-600, Korea.
Seon Joo
SJ
Lee
Division of Advanced Materials, Korea Research Institute of Chemical Technology , 4 Gajeong-Ro, Yuseong-Gu, Daejeon 305-600, Korea.
Nam Joong
NJ
Jeon
Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.
Young-Chang
YC
Joo
Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.
Ik Jae
IJ
Park
Division of Advanced Materials, Korea Research Institute of Chemical Technology , 4 Gajeong-Ro, Yuseong-Gu, Daejeon 305-600, Korea.
Jun Hong
JH
Noh
Division of Advanced Materials, Korea Research Institute of Chemical Technology , 4 Gajeong-Ro, Yuseong-Gu, Daejeon 305-600, Korea.|School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 689-798, Korea.
Sang Il
SI
Seok