Defect mitigation using d-penicillamine for efficient methylammonium-free perovskite solar cells with high operational stability

Abstract

Iodine vacancy defects in MA-free perovskite are effectively passivated through the interaction between Pb2+ and the functional groups in d-penicillamine, resulting in an impressive efficiency of 22.4% along with excellent operational stability.

Effect of Antisolvent Application Rate on Film Formation and Photovoltaic Performance of Methylammonium‐Free Perovskite Solar Cells

“…[ 16,17 ] Therefore, MA‐free perovskite compositions represent a more viable pathway toward commercialization. [ 18–24 ]…”

“…[16,17] Therefore, MA-free perovskite compositions represent a more viable pathway toward commercialization. [18][19][20][21][22][23][24] A commonly used technique to form solution-processed thinfilm perovskite layers, including MA-free compositions, is via an antisolvent method. [25] Here, during spin coating, an antisolvent is dripped onto the wet perovskite film, which rapidly induces crystallization of the perovskite and facilitates removal of any residual precursor solvent.…”

A dopant-free hole transport material boosting the performance of inverted methylamine-free perovskite solar cells

“…Methylamine (MA)-free perovskite solar cells (PSCs) have attracted widespread interest, with continuous improvement of power conversion efficiency (PCE). 1–5 The great advancement of PSCs results from the outstanding properties of perovskite, 6,7 which is also inseparable from the rapid development of interface materials, especially hole transport materials (HTMs) for inverted PSCs, because these materials can avoid the limitations of HTMs for regular-structured devices. For example, these materials are dopant-free HTMs, which are beneficial to reduce the hysteresis and improve the stability of devices.…”

Defect Passivation for Perovskite Solar Cells: from Molecule Design to Device Performance

“…Defect passivation is a promising way to reduce the non‐radiative recombination loss, and many passivation agents for perovskite materials have been developed, including inorganic metallic salts (e. g., NaF, CaI 2 , KOH, and PbSO 4 ), [29–31] low‐dimensional wide‐bandgap perovskite phase, [32,33] insulating polymers, [34,35] and organic small molecules [36–40] . Among them, organic molecules offer a large structure flexibility for passivating different kinds of defect states and can adapt to a variety of perovskite compositions [41–43] .…”