Highly efficient perovskite solar cells with crosslinked PCBM interlayers

Abstract

PCBM crosslinked with 1,6-diazidohexane (DAZH) was introduced to solve the solvent incompatibility of depositing a solution processed perovskite layer onto it.

Loss Analysis in Perovskite Photovoltaic Modules

“…Solution-processed PCBM dissolved in cholorobenzene (20 mg mL À1 ) was used to passivate the interface. [55] We used a threecation perovskite (CsFAMAPbIBr) due to its improved performance. [56] Finally, Spiro-OMeTAD dissolved in chlorobenzene (80 mg mL À1 ), doped with 28.5 μL mL À1 of 4-tert-butylpyridine and 17.5 μL mL À1 of bis(trifluoromethane)sulfonimide lithium salt (Li-TFSI, 520 mg mL À1 in acetonitrile) served as HTL with thermally evaporated 80 nm of gold as back electrode.…”

From colossal magnetoresistance to solar cells: An overview on 66 years of research into perovskites

“…A key challenge with this one‐step method is that the morphology and quality of the resulting films are mainly determined by the shrinking of the film due to the simultaneous removal of excess solvent through evaporation and crystallization of perovskite . In a typical two‐step method, a PbI 2 precursor layer is first deposited on a substrate and methylammonium iodide is then diffused into the previous layer from a solution in propanol, isopropanol or similar . Points of attention with this approach are the volume expansion and efficient diffusion of methyl ammonium.…”

SiW12–TiO2 Mesoporous Layer for Enhanced Electron‐Extraction Efficiency and Conductivity in Perovskite Solar Cells

“…[9,10] Up to now,a lthough numerousi norganic and organics emiconductors have been successfully explored and utilized as the electron-transport materials (ETM), TiO 2 is still the most commonly appliedE TM in many high-efficiency PSCs owing to its favorable energy level, easy fabrication process, environmental friendliness,a nd al ong electron lifetime. [12][13][14][15][16][17][18] Polyoxometalates (POMs), al arge family of metal oxygen clusters with structure diversity and component variability, have been widely appliedi nv arious fields owing to their outstandingp hysicochemical features, such as structural stability, strong redox properties, ease synthesis, being nontoxic to the environment, ands oo n. [19][20][21][22] More interestingly,P OM anions can accept electrons and retain an intact structure because of several empty do rbitals in its structure. [5] However,l ow electron mobility,m ismatchedb and gaps, and the high-traps tate density of pristine TiO 2 usually lead to some deteriorative influence on the device efficiency, stability, or notorious hysteresis of PSCs.…”

“…Accordingly,m any efforts have already been devoted to modifying and manipulatingp ristine TiO 2 by doping with metal or nonmetal (such as Mg, Al, and Nd), regulating the morphology and crystallinity of TiO 2 (such as nanorods, nanotubes, or rutile phase) and interface engineering of TiO 2 film [bis(trifluoromethane)sulfonimide lithium salt (LiTFSI) or PCBM treatment]. [12][13][14][15][16][17][18] Polyoxometalates (POMs), al arge family of metal oxygen clusters with structure diversity and component variability, have been widely appliedi nv arious fields owing to their outstandingp hysicochemical features, such as structural stability, strong redox properties, ease synthesis, being nontoxic to the environment, ands oo n. [19][20][21][22] More interestingly,P OM anions can accept electrons and retain an intact structure because of several empty do rbitals in its structure. [20] POMs have therefore been extensively investigatedi np hotovoltaic fields.…”