Rational design of SnO2-based electron transport layer in mesoscopic perovskite solar cells: more kinetically favorable than traditional double-layer architecture

Abstract

Here, the interfacial synergism of discontinuous spot shaped SnO 2 and TiO 2 mesoporous nanocomposite as electron transfer layer (ETL) underlayer is presented in highly efficient mesoscopic perovskite solar cells (M-PSCs). Based on this new strategy, strong charge recombination observed in previous SnO 2 -based ETLs is suppressed to a great extent as the pathways of charge recombination and energy loss are blocked effectively. Meanwhile, the internal series resistance of entire M-PSC is decreased remarkably. The new ETL is more kinetically favorable to electron transfer and thus results in significant photovoltaic improvement and alleviated hysteresis effect of M-PSCs.

Review on the Application of SnO2 in Perovskite Solar Cells

“…TiO 2 is the most preferable metal oxide chosen to be combined with SnO 2 . Combination of SnO 2 and TiO 2 may be a viable avenue to improve PCE and broaden the application of PSCs .…”

SnO2-based electron transporting layer materials for perovskite solar cells: A review of recent progress

“…For SnO 2 -TiO 2 mesoporous nanocomposite layer, a high PCE PSCS can be achieved using interfacial synergies of the discontinuous spot between SnO 2 and TiO 2 particles. Using this strategy, SnO 2 ETL-based PSCs can better suppress charge recombination, which effectively reduces energy loss [131] . Dong et al used this strategy and obtained the peak PCE of 17.58% [131] .…”

“…Using this strategy, SnO 2 ETL-based PSCs can better suppress charge recombination, which effectively reduces energy loss [131] . Dong et al used this strategy and obtained the peak PCE of 17.58% [131] . Lee et al revealed a low-temperature processed SnO 2 with self-passivating nature used in a SnO 2 scaffold PSC device [126] .…”

Performance enhancement of low temperature processed tin oxide as an electron transport layer for perovskite solar cells under ambient conditions

“…Therefore, most studies are either partially or completely conducted in controlled environments to fabricate highly efficient and stable PSCs or do not provide details on whether the process has been carried out in a controlled environment. [7][8][9][10][11][12][13][14] Thus, more studies are necessary to fabricate PSCs under ambient conditions that can provide PSCs with high photovoltaic performances. On the other hand, cost is another factor that needs to be considered for the PSCs to meet the commercialization challenge.…”