TY - JOUR
T1 - Design principles for electronic charge transport in solution-processed vertically stacked 2D perovskite quantum wells
AU - Tsai, Hsinhan
AU - Asadpour, Reza
AU - Blancon, Jean Christophe
AU - Stoumpos, Constantinos C.
AU - Even, Jacky
AU - Ajayan, Pulickel M.
AU - Kanatzidis, Mercouri G.
AU - Alam, Muhammad Ashraful
AU - Mohite, Aditya D.
AU - Nie, Wanyi
N1 - Funding Information:
The work at Los Alamos National Laboratory (LANL) was supported by the LANL LDRD program under grant 20180026DR (XWPG) (W.N., H.T., and J.-C.B.). A.D.M. acknowledges support by Office of Energy Efficiency and Renewable Energy grant DE-FOA-0001647-1544 for this work. The work at Purdue University was supported by the National Science Foundation under Grant No. 1724728. M.G.K. acknowledges the support from the Office of Naval Research grant N00014-17-1-2231 (stability of 2D perovskites). The GIWAXS maps were done with the help of Dr. Joseph W. Strzalka (X-Ray Science Division) and the use of sector 8-IDE in Advanced Photon Source was supported by US Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - State-of-the-art quantum-well-based devices such as photovoltaics, photodetectors, and light-emission devices are enabled by understanding the nature and the exact mechanism of electronic charge transport. Ruddlesden-Popper phase halide perovskites are two-dimensional solution-processed quantum wells and have recently emerged as highly efficient semiconductors for solar cell approaching 14% in power conversion efficiency. However, further improvements will require an understanding of the charge transport mechanisms, which are currently unknown and further complicated by the presence of strongly bound excitons. Here, we unambiguously determine that dominant photocurrent collection is through electric field-assisted electron-hole pair separation and transport across the potential barriers. This is revealed by in-depth device characterization, coupled with comprehensive device modeling, which can self-consistently reproduce our experimental findings. These findings establish the fundamental guidelines for the molecular and device design for layered 2D perovskite-based photovoltaics and optoelectronic devices, and are relevant for other similar quantum-confined systems.
AB - State-of-the-art quantum-well-based devices such as photovoltaics, photodetectors, and light-emission devices are enabled by understanding the nature and the exact mechanism of electronic charge transport. Ruddlesden-Popper phase halide perovskites are two-dimensional solution-processed quantum wells and have recently emerged as highly efficient semiconductors for solar cell approaching 14% in power conversion efficiency. However, further improvements will require an understanding of the charge transport mechanisms, which are currently unknown and further complicated by the presence of strongly bound excitons. Here, we unambiguously determine that dominant photocurrent collection is through electric field-assisted electron-hole pair separation and transport across the potential barriers. This is revealed by in-depth device characterization, coupled with comprehensive device modeling, which can self-consistently reproduce our experimental findings. These findings establish the fundamental guidelines for the molecular and device design for layered 2D perovskite-based photovoltaics and optoelectronic devices, and are relevant for other similar quantum-confined systems.
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U2 - 10.1038/s41467-018-04430-2
DO - 10.1038/s41467-018-04430-2
M3 - Article
C2 - 29849026
AN - SCOPUS:85047872566
VL - 9
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 2130
ER -