Buried modification with tetramethylammonium chloride to enhance the performance of perovskite solar cells with n-i-p structure

Enhanced performance of perovskite solar cells via a bilateral electron-donating passivator as a molecule bridge

“…In impedance measurements, the high-frequency component usually indicates the charge transfer resistance ( R ct ), while the low-frequency component is typically associated with the complex resistance ( R rec ). 39 Relative to the pristine device, the HAL-modified device exhibits a significant decrease in R ct coupled with a marked increase in R rec , which demonstrated that the introduction of HAL can effectively enhance carrier extraction and transfer, as well as inhibit carrier recombination at the ETL/PVK interface.…”

“…The observed shift in the I 3d XPS spectra suggests that the interaction between HAL and PbI 2 may have resulted in a decrease in the oxidation state of iodide or weakening of the Pb–I bond. 39 The interaction of HAL and PbI 2 may be attributed to the existence of the electron-donating groups (–NH 2 /–OH) with lone pairs of electrons in HAL. As illustrated in Fig.…”

Improving Thermal Stability of High-Efficiency Methylammonium-Free Perovskite Solar Cells via Chloride Additive Engineering

“…Figure 1d illustrates that the O 1s of the SnO 2 film exhibits a marginally wide asymmetric peak, deconvoluting the spectrum reveals peaks indicative of BACl. 41,54,57 The reduction in oxygen vacancy density and the shift of the Sn 3d signal to higher binding energy both serve as evidence that the deep-level defect in SnO 2 is effectively passivated by BACl. 54 As illustrated in Figure S6 In hybrid perovskite materials, the primary components of traps are intrinsic defects, such as FA + /Cs + and I − vacancy.…”

Application of arginine-doped PEDOT:PSS as a hole transfer layer in perovskite solar cells

“…The WF of the HTL significantly affects the V oc of perovskite solar cells because V oc is related to the energy loss at the interface layer. 37–39 Therefore, we conducted UPS measurements on the PEDOT:PSS film, as shown in Fig. S2 (ESI†).…”