Fully-ambient-air and antisolvent-free-processed stable perovskite solar cells with perovskite-based composites and interface engineering

SrTiO3/Al2O3‐Graphene Electron Transport Layer for Highly Stable and Efficient Composites‐Based Perovskite Solar Cells with 20.6% Efficiency

“…Though the previously reported focused on enhancement of open-circuit voltage and electron transport, there are shortcomings regarding lack of thermal-and photostability and fast decomposition of lead iodide in presence of transition metal oxides. [7,20,21] In order to solve the stability issues, perovskite-based composites with metal oxides and graphene were reported for the fabrication of stable and efficient PSCs. [18][19][20][21][22] Among the composites, MAPbI 3−x Cl x /Ag-reduced graphene oxide (perovskite/Ag-rGO) composite showed remarkable enhancement of the thermal-and For practical use of perovskite solar cells (PSCs) the instability issues of devices, attributed to degradation of perovskite molecules by moisture, ions migration, and thermal-and light-instability, have to be solved.…”

“…[7,20,21] In order to solve the stability issues, perovskite-based composites with metal oxides and graphene were reported for the fabrication of stable and efficient PSCs. [18][19][20][21][22] Among the composites, MAPbI 3−x Cl x /Ag-reduced graphene oxide (perovskite/Ag-rGO) composite showed remarkable enhancement of the thermal-and For practical use of perovskite solar cells (PSCs) the instability issues of devices, attributed to degradation of perovskite molecules by moisture, ions migration, and thermal-and light-instability, have to be solved. Herein, highly efficient and stable PSCs based on perovskite/Ag-reduced graphene oxide (Ag-rGO) and mesoporous Al 2 O 3 /graphene (mp-AG) composites are reported.…”

Precursor Engineering for Ambient‐Compatible Antisolvent‐Free Fabrication of High‐Efficiency CsPbI2Br Perovskite Solar Cells

“…[ 7,8 ] However, such a preparation process not only increases the cost and complicates the fabrication process, but also often requires toxic antisolvents, such as chlorobenzene, which is inappropriate for large‐scale fabrication at low cost in air. [ 9 ] In order to explore an effective technology for fabricating fully ambient‐air processed inorganic/hybrid PSCs, various technologies have been developed, such as an antisolvent strategy, [ 10 ] solvent engineering, [ 11 ] N 2 /air blading, [ 12,13 ] nitrogen/hot air blowing (including gas quenching), [ 14,15 ] and the hot‐casting technique (HCT). [ 16,17 ] However, these improved strategies ineluctably increase the complexity of the device fabrication process.…”

A bilayer TiO2/Al2O3 as the mesoporous scaffold for enhanced air stability of ambient-processed perovskite solar cells

“…One attractive approach is the use of mesoscopic engineering. [18][19][20][21] Mesoscopic structures have been extensively employed in PSCs, where they mainly function as a large-surface-area supporting scaffold and/or charge transport medium. Several studies have reported enhanced air stability offered by the mesoscopic structures in comparison to planar heterojunctions, [22][23][24] despite the fact that planar devices are benefitting from simple architecture and a low-temperature process.…”

“…In addition, a tenfold increase in the rate of charge collection is observed in Al 2 O 3 -based devices compared to that observed in the TiO 2 counterparts, indicating faster electron diffusion through the perovskite phase, than through the n-type TiO 2 . 34 Further developments based on this strategy employed insulating metal oxides, such as Al 2 O 3 or ZrO 2 , as a spacer between the electron transport and hole transport materials to form a triple- 19,20 or a quadruple- 21 layer mesoscopic architecture, with a B10 mm thick mesoscopic carbon electrode for better air stability. However, the opaque carbon layer does not allow incident light to go through it, leading to a low light transmittance of the overall device.…”