Low-temperature electrospray-processed SnO2 nanosheets as an electron transporting layer for stable and high-efficiency perovskite solar cells

Functional Metal Oxides in Perovskite Solar Cells

“…To avoid high-temperature calcination, Lv et al used low-temperature ALD technology to introduce the pinhole-free TiO 2 layer into PSCs., showing that the degradation of the perovskite layer during the process of fabricating the TiO 2 layer is indeed negligible. [16] As mentioned above, the nanostructured ETL can reduce charge recombination, improves charge transfer efficiency, as well as increases the device efficiency. [14] Other metal oxides have been used as ETL in PSCs, including ZnO and Nb 2 O 5.…”

“…[15] Mahmood et al introduced a viable electrospray route for one-step deposition of high mesoporous SnO 2 nanosheets (NS), with reduced hysteresis, high charge collection efficiency, and improved environmental stability. [16] As mentioned above, the nanostructured ETL can reduce charge recombination, improves charge transfer efficiency, as well as increases the device efficiency. Nb 2 O 5 is another emergent material employed in ETL.…”

Beneficial Role of Organolead Halide Perovskite CH3NH3PbI3/SnO2 Interface: Theoretical and Experimental Study

“…Although ZnO ETLs could be fabricated at low temperature, the hydroxyl groups on ZnO surface and the residual acetate ligand at the ZnO/CH 3 NH 3 PbI 3 interfaces could decompose the perovskite films . Meanwhile, the ineffective electron transfer at the ZnO/perovskite interfaces significantly deteriorates the hysteresis of PSCs . Compared with ZnO ETL, SnO 2 has been regarded as a smart ETL due to its wider bandgap, higher electron mobility, better chemical stability, and low processing temperature .…”

Co-axial electrospray: a versatile tool to fabricate hybrid electron transporting materials for high efficiency and stable perovskite photovoltaics

“…Organic-inorganic perovskite solar cells (PSCs), have drawn extensive attention from the photovoltaic community owing to their superior photovoltaic performance as well as ease of fabrication at low temperatures by simple solution-based processing techniques. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Particularly in mesoscopic PSCs, a thin layer of mesoporous TiO 2 serves as an electrontransporting material (ETM) by accepting electrons from the perovskite absorber and transferring them to a conducting substrate. Usually, the mesostructured TiO 2 ETMs used for PSCs are composed of TiO 2 nanoparticles (NPs) with sizes of 40-80 nm.…”