Low temperature processable crystalline WO3 Langmuir-Blodgett ultra-thin film as blocking layer in solar cells application

Controllable-assembled functional monolayers by the Langmuir–Blodgett technique for optoelectronic applications

“…The means to achieve carrier balance by constructing a blocking layer and a transport layer through LB is more representative of the applications in LED devices and solar cell devices. [197][198][199][200] Yang et al realized the regular arrangement of the thickness-controlled reduced graphene oxide (RGO) nanosheet thin film by the LB technique and applied the thin film material between the active organic layer and the indium tin oxide (ITO) electrode in solar cells. 197 Due to the flexible property of RGO, the LB deposition method can substantially suppress the folding and wrinkling of graphene oxide sheets to form a smooth film.…”

“…In particular, Mewada et al constructed layer-tunable WO 3 ultra-thin films by the LB technique as an electron transport and hole-blocking layer in dye-sensitized solar cell structures after UV light treatment. 200 The dense molecular arrangement of the films effectively suppresses the hole transport. The device exhibits improved conversion efficiency, short circuit current density, and open circuit voltage parameters.…”