A holistic sunscreen interface strategy to effectively improve the performance of perovskite solar cells and prevent lead leakage

A multifunctional chemical linker in a buried interface for stable and efficient planar perovskite solar cells

“…S2 (ESI †), the obvious shift of the CQO stretching vibration characteristic peak in the structure after coating HMBS on the SnO 2 substrate confirmed both the existence of HMBS molecules on the SnO 2 surface and the strong chemical interaction between HMBS and SnO 2 . 26 The appearance of an S 2p characteristic peak in Fig. 1c also confirmed the existence of HMBS on the surface of the SnO 2 film again.…”

Simultaneous Chemical Crosslinking of SnO2 and Perovskite for High‐Performance Planar Perovskite Solar Cells with Minimized Lead Leakage

“…From the analysis results of UPS, we calculated that the W F of bare SnO 2 , SnO 2 /DPM, and PVK films were 5.84, 5.96, and 6.31 eV, respectively. Combined with the optical bandgap obtained in Figure S3b and S7b, Supporting Information, we obtained the schematic diagram of the energy‐level arrangement structure of SnO 2 ETL, SnO 2 /DPM ETL, PVK, and spiro‐OMeTAD HTL, [ 32 ] as shown in Figure S5, Supporting Information. Compared with bare SnO 2 , the energy offset between the conduction band minimum (CBM) of SnO 2 /DPM and that of upper PVK is more conducive to promote the charge carrier transport at ETL/PVK interface and inhibit the nonradiative recombination.…”

Mitigating Potential Lead Leakage Risk of Perovskite Solar Cells by Device Architecture Engineering from Exterior to Interior

“…Similarly, Tang et al introduced an amphoteric phenylbenzimidazole sulfonic acid (PBSA) into the perovskite precursor 144 and at the PVK/HTL interface. 145 The PBSA not only mitigated Pb leakage but also regulated crystallization growth and passivated defects for the preparation of high-PCE PSCs.…”

“…More importantly, once PSCs are degenerated by water, the near-planar porphyrin rings can chelate with dissociated Pb ions to form stable and water-insoluble fullerene-based metalloporphyrin (FPD-Pb) complexes. Similarly, Tang et al introduced an amphoteric phenylbenzimidazole sulfonic acid (PBSA) into the perovskite precursor and at the PVK/HTL interface . The PBSA not only mitigated Pb leakage but also regulated crystallization growth and passivated defects for the preparation of high-PCE PSCs.…”