Interfacial engineering of a thiophene-based 2D/3D perovskite heterojunction for efficient and stable inverted wide-bandgap perovskite solar cells

Internal Encapsulation for Lead Halide Perovskite Films for Efficient and Very Stable Solar Cells

“…[64] The results are shown in Figure 3d boundaries of ITO. [65] However, after introducing NbCl 5 , the buried interface between perovskite and SnO 2 shows a higher count of Clwith lower I -. This originates from fewer oxygen vacancies and Nb 2 O 5 formed on the surface of SnO 2 , and the homogeneous and better-crystallized perovskite obtained after NbCl 5 modification.…”

Thiophene Derivatives as Ligands for Highly Luminescent and Stable Manganese-Doped CsPbCl3 Nanocrystals

“…The CPCM NCs appear a new peak at 28.9° after 60 days of storage, which can be attributed to the formation of PbCl 2 from the decomposition of the CPCM, while the CPCM-TBA NCs did not show any new peaks after 100 days. Apart from the influence of defect modification, the increase of storage stability may also partially come from the enhancement of hydrophobicity ( Chen et al, 2021 ), as shown in Supplementary Figure S8 . The water contact angle increases from 66° (CPCM) to 87° (CPCM-TBA).…”

“…Nevertheless, the potential of more effective ligands, such as thiophene derivatives, remains rather unexplored. In this respect, recent literatures on high-performance perovskite solar cells (PSCs) using thiophene additives ( Wen et al, 2020 ; Chen et al, 2021 ; Choi et al, 2021 ; Guo et al, 2021 ; Ren et al, 2021 ) to passivate the defects of perovskite films are highly encouraging. Consequently, we envision that thiophene additives have the potential to be further applied as ligands in the synthesis process of all-inorganic perovskite NCs.…”

Dimensional Engineering Enables 1.31 V Open‐Circuit Voltage for Efficient and Stable Wide‐Bandgap Halide Perovskite Solar Cells

“…Recently, progress has been made for reducing the V OC deficit of the WBG perovskite via forming a low‐dimensional perovskite (2D Ruddlesden–Poppor (RP) or Dion–Jacobson (DJ) phase)) on the surface of 3D perovskite using large alkylammonium halides. [ 29–33 ] The chemical formula of 2D RP perovskite is (RNH 3 ) 2 A n −1 Pb n I 3 n +1 , where RNH 3 is a large organic spacer cation and A is a small organic cation. The symbol n indicates the number of [PbI 6 ] 4− octahedral layers between contiguous organic layers.…”