The triple π-bridge strategy for tailoring indeno[2,1-b]carbazole-based HTMs enables perovskite solar cells with efficiency exceeding 21%

Abstract

Methoxy-free donors are an emerging class of alternative methoxy triphenylamine materials toward stable organic hole-transporting materials (HTMs). However, low cost, stable and efficient methoxy-free donors are scarce. Moreover, the lack...

Exploration of conjugated π-bridge units in N,N-bis(4-methoxyphenyl)naphthalen-2-amine derivative-based hole transporting materials for perovskite solar cell applications: a DFT and experimental investigation

“…CsFAMA, −5.6 eV (ref. 33 and 34 )). Correspondingly, the LUMO energy level of HTMs should be higher than the conduction band (CB) of CsFAMA (−3.9 eV (ref.…”

“…Correspondingly, the LUMO energy level of HTMs should be higher than the conduction band (CB) of CsFAMA (−3.9 eV (ref. 33 and 34 )), in order to prevent electron collection to the metal electrode. The chemical structures of the designed CP1 and CP2 are presented in Fig.…”

“…37,38 In this paper, chlorobenzene was chosen as the solvent for the calculation of DG, which describes the difference between the free energy of the organic materials in the solvent and the gas. 34,37 The calculated DG values of H101, CP1 and CP2 are À14.54, À11.72 and À12.95 kcal mol À1 , respectively (Table 2). The DG values CP1 and CP2 are small than that of H101.…”

Advancements in organic small molecule hole-transporting materials for perovskite solar cells: past and future

“…4). [61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77] To name a few of the advantages that doping appears to have, charge transport, recombination suppression, and trap formation inhibition are all possible outcomes. Doping, on the other hand, has gained widespread acceptance as a method for improving the optoelectronic properties of PSCs.…”

Simple Yet Efficient: Arylamine‐Terminated Carbazole Donors for Organic Hole Transporting Materials

“…Hole transport materials (HTMs) are necessary for PSCs to extract and transport the free photogenerated holes within the perovskite material. Efforts have been devoted to designing and fabricating HTMs from organic building blocks, [ 5,6 ] including organic small molecules, [ 7–36 ] polymers, [ 37,38 ] and organometallic compounds. [ 39–41 ] Among them small organic HTMs have received tremendous attentions due to their high performance, structural variety, and easy fabrication.…”