High-conductivity thiocyanate ionic liquid interface engineering for efficient and stable perovskite solar cells

Abstract

A high-conductivity thiocyanate ionic liquid (EMIMSCN) was introduced into perovskite solar cells for the first time. The high conductivity of EMIMSCN ensures adequate supply of free SCN- anions and EMIM+...

Fine-tuning chemical passivation over photovoltaic perovskites by varying the symmetry of bidentate acceptor in D–A molecules

“…49 These results illustrate that TA-MN indeed owns better passivating ability and thus achieves suppressed trap-assisted recombination more effectively, which can indirectly verify the synergistic passivating effect of the TA-MN molecule. 18,50 The dependency of V OC and J SC on the light intensity was investigated to gain deeper insight into the carrier recombination mechanisms of PSCs. 51 According to J SC = I a , the J SC alters as a function of the light intensity in Fig.…”

Recent advances in ionic molecules applied in perovskite solar cells

“…However, hydrophilic components such as ionic groups should also be included in these molecules to Fig. 21 Chemical structures of PF5A, PF5N, PF5O, 145 QPSCl, 146 PL-A, 147 FSA, 148 LPEI, 149 BED, 150 DMIMB, 151 C4I, C6I, 152 EMIMSCN, 154 BZMIMCl, 155 EMIM-TFSI, 157 and MOCs. ensure adequate coverage of the perovskite films.…”

Role of Ionic Liquids in Perovskite Solar Cells

“…Finally, the PCE of [PEVIM]Cl‐modified PSCs increased from 12.49% to 14.19%, and maintained 91% of initial PCE at 85 °C in a nitrogen atmosphere for 360 h. Wang et al used IL 1‐ethyl‐3‐methylimidazolium thiocyanate (EMIMSCN) to modify the top surface of (FA 0.92 MA 0.08 )PbI 3 perovskite film. [ 66 ] The DFT calculation results showed that both EMIM + and SCN − could passivate the V I and Pb–I antisite defects of perovskite surfaces. Therefore, the EMIMSCN‐treated devices reached an efficiency of 22.55%.…”