Abstract:
An organic solar cell comprises a photoactive layer that comprises at least one donor polymer and two non-fullerene molecular acceptors. Further, an organic solar cell comprises a photoactive layer that comprises one donor polymer, one fullerene acceptor, and one non-fullerene molecular acceptor. The donor polymer may exhibit temperature dependent aggregation (TDA) properties in solution, wherein the absorption onset of the polymer solution exhibits a red shift of at least 80 nm when the solution is cooled from 100℃ to room temperature or the absorption onset of the polymer solution exhibits a red shift of at least 40 nm when the solution is cooled from 100℃ to 0℃.
Abstract:
Methods for the all room-temperature fabrication of organolead halide perovskite films which are PbI 2 residue-free, have large grain-sizes, and are highly crystalline. All room-temperature fabrication of high-performance flexible perovskite solar cells are achieved by using such organolead halide perovskite films.
Abstract:
A method for producing an organic charge transporting film. The method comprises steps of: (a) applying to a substrate a first polymer resin which has substituents which are sulfonic acids, sulfonic acid salts or esters of sulfonic acids; and (b) applying over the first polymer resin a second polymer resin having M w at least 3,000 and comprising arylmethoxy linkages.
Abstract:
The present invention relates to a method for producing a solid state solar cell, comprising the steps of providing a conductive support layer or current collector, applying a metal oxide layer on the conducting support layer, applying at least one sensitizer layer onto the metal oxide layer or onto a first optional layer covering the metal oxide layer, said first optional layer comprising a charge transporting layer, applying a second optional layer onto the sensitizer layer, said second optional layer being selected from a charge transporting layer, a protective layer, or a combination of both layers, and providing a counter electrode or a metal electrode onto the sensitizer layer or the second optional layer. The at least one sensitizer layer comprises an organic-inorganic or metal halide perovskite and is treated by the application of a vacuum before the annealing of the sensitizer. (VASP refers to vacuum-flash assisted solution process and CP to conventional process)
Abstract:
A compound of formula (I): (Core)n – (X)m wherein Core is a core group; n is 0 and m is 1, or n is 1 and m is at least 1; and X is a group of formula (II): wherein: R 1 , R 3 and R 5 are each independently H or a substituent; R 2 and R 4 are each a substituent; one of R 1 -R 5 is a direct bond or divalent linking group linking the group of formula (II) to Core in the case where n is 1; x and y are 0, 1, 2, 3 or 4; and the compound of formula (I) is substituted with at least one ionic substituent. The compound may be used as an n-dopant to dope an organic semiconductor.