TY - JOUR
T1 - Simple route to interconnected, hierarchically structured, porous Zn2SnO4 nanospheres as electron transport layer for efficient perovskite solar cells
AU - Zhang, Meng
AU - Cui, Xun
AU - Wang, Yufen
AU - Wang, Bing
AU - Ye, Meidan
AU - Wang, Wenlong
AU - Ma, Chunyuan
AU - Lin, Zhiqun
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/5
Y1 - 2020/5
N2 - Constructing electron transport layer (ETL) with higher carrier mobility and suitable bandgap is of key importance as it greatly influences the photovoltaic performance of perovskite solar cells (PSCs). Zn2SnO4 (ZTO) carries a high electron mobility of 10–30 cm2 V−1 s−1, an order of magnitude over the widely used TiO2 ETL in PSCs, rendering it an excellent alternative to TiO2 ETL. Herein, we report a simple yet robust polymer-templating route to interconnected, hierarchically structured, porous ZTO nanospheres as an efficient ETL for high-performance organolead halide PSCs. The porous ZTO nanospheres ETL, composed of an assembly of 4.5-nm ZTO nanoparticles on the surface of porous nanosphere possessing 80–100 nm cavity, renders markedly improved light absorption, enhanced electron extraction, facilitated charger transportation, and suppressed carrier recombination in the resulting PSCs, which exhibit a power conversion efficiency (PCE) of 17.14%, greatly outperforming the device based on the ZTO nanoparticles (14.02%; i.e., without porosity). As such, the strategy for crafting porous yet hierarchically structured semiconductors with high carrier mobility may open up an avenue to create robust ETL, and by extension, hole transport layer (HTL) for high-performance optoelectronics.
AB - Constructing electron transport layer (ETL) with higher carrier mobility and suitable bandgap is of key importance as it greatly influences the photovoltaic performance of perovskite solar cells (PSCs). Zn2SnO4 (ZTO) carries a high electron mobility of 10–30 cm2 V−1 s−1, an order of magnitude over the widely used TiO2 ETL in PSCs, rendering it an excellent alternative to TiO2 ETL. Herein, we report a simple yet robust polymer-templating route to interconnected, hierarchically structured, porous ZTO nanospheres as an efficient ETL for high-performance organolead halide PSCs. The porous ZTO nanospheres ETL, composed of an assembly of 4.5-nm ZTO nanoparticles on the surface of porous nanosphere possessing 80–100 nm cavity, renders markedly improved light absorption, enhanced electron extraction, facilitated charger transportation, and suppressed carrier recombination in the resulting PSCs, which exhibit a power conversion efficiency (PCE) of 17.14%, greatly outperforming the device based on the ZTO nanoparticles (14.02%; i.e., without porosity). As such, the strategy for crafting porous yet hierarchically structured semiconductors with high carrier mobility may open up an avenue to create robust ETL, and by extension, hole transport layer (HTL) for high-performance optoelectronics.
KW - Electron transport layer
KW - Hierarchical nanostructure
KW - High electron mobility
KW - Perovskite solar cells
KW - ZnSnO
UR - http://www.scopus.com/inward/record.url?scp=85079666013&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2020.104620
DO - 10.1016/j.nanoen.2020.104620
M3 - Article
AN - SCOPUS:85079666013
SN - 2211-2855
VL - 71
JO - Nano Energy
JF - Nano Energy
M1 - 104620
ER -