TY - JOUR
T1 - A novel quadruple-cation absorber for universal hysteresis elimination for high efficiency and stable perovskite solar cells
AU - Bu, Tongle
AU - Liu, Xueping
AU - Zhou, Yuan
AU - Yi, Jianpeng
AU - Huang, Xin
AU - Luo, Long
AU - Xiao, Junyan
AU - Ku, Zhiliang
AU - Peng, Yong
AU - Huang, Fuzhi
AU - Cheng, Yi Bing
AU - Zhong, Jie
PY - 2017/12/1
Y1 - 2017/12/1
N2 - Organic-inorganic metal halide perovskite solar cells (PSCs) have made a striking breakthrough with a power conversion efficiency (PCE) over 22%. However, before moving to commercialization, the hysteresis of PSCs, characterized as an inconsistent photovoltaic conversion property at varied electric fields, should be eliminated for stable performance. Herein, we present a novel quadruple-cation perovskite absorber, KxCs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 (labeled as KCsFAMA), with which the hysteresis in PSCs can be fully eliminated irrespective of the electron transportation layers. The incorporation of potassium intensively promotes the crystallization of the perovskite film with a grain size up to ∼1 μm, doubled compared to the K free counterparts. Further characterization revealed that a lower interface defect density, longer carrier lifetime and fast charge transportation have all made contributions to the hysteresis-free, stable and high PCE (20.56%) of the KCsFAMA devices. Moreover, we present a 6 × 6 cm2 sub-module with the KCsFAMA composition achieving a high efficiency of 15.76% without hysteresis. This result suggests that the quadruple-cation perovskite is a highly attractive candidate for future developments of efficient and stable PSC modules.
AB - Organic-inorganic metal halide perovskite solar cells (PSCs) have made a striking breakthrough with a power conversion efficiency (PCE) over 22%. However, before moving to commercialization, the hysteresis of PSCs, characterized as an inconsistent photovoltaic conversion property at varied electric fields, should be eliminated for stable performance. Herein, we present a novel quadruple-cation perovskite absorber, KxCs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 (labeled as KCsFAMA), with which the hysteresis in PSCs can be fully eliminated irrespective of the electron transportation layers. The incorporation of potassium intensively promotes the crystallization of the perovskite film with a grain size up to ∼1 μm, doubled compared to the K free counterparts. Further characterization revealed that a lower interface defect density, longer carrier lifetime and fast charge transportation have all made contributions to the hysteresis-free, stable and high PCE (20.56%) of the KCsFAMA devices. Moreover, we present a 6 × 6 cm2 sub-module with the KCsFAMA composition achieving a high efficiency of 15.76% without hysteresis. This result suggests that the quadruple-cation perovskite is a highly attractive candidate for future developments of efficient and stable PSC modules.
UR - http://www.scopus.com/inward/record.url?scp=85038566330&partnerID=8YFLogxK
U2 - 10.1039/c7ee02634j
DO - 10.1039/c7ee02634j
M3 - Article
AN - SCOPUS:85038566330
VL - 10
SP - 2509
EP - 2515
JO - Energy & Environmental Science
JF - Energy & Environmental Science
SN - 1754-5692
IS - 12
ER -