Synergistic improvements in stability and performance of lead iodide perovskite solar cells incorporating salt additives

Abstract

Alkali metal halide additives chelate with Pb2+ ions during film formation promoting homogeneous nucleation, which greatly enhances the power conversion efficiency (15.08%) and stability (over 50 days) of planar perovskite solar cells.

BODIPY‐Based Semiconducting Materials for Organic Bulk Heterojunction Photovoltaics and Thin‐Film Transistors

“…BHJ-OPVs could be manufactured via very simple and cost-effective solution-based methods such as spin-coating, spray deposition, and printing. [23][24][25][26][27][28][29][30] During recent years, remarkable developments have been achieved in BHJ-OPVs through the optimization of molecular design on the active/interfacial layers along with the morphology control and improved fabrication methods. Mostly, polymer donor-based OPVs have displayed higher power conversion efficiencies (PCEs) compared to the small molecule-based devices.…”

CH3NH3Cl Assisted Solvent Engineering for Highly Crystallized and Large Grain Size Mixed-Composition (FAPbI3)0.85(MAPbBr3)0.15 Perovskites

“…It is thus urgent to explore a method to gain high-quality films and improve perovskite crystallization. In previous studies on the MAPbI 3 perovskite, the additive method was an effective way to control perovskite crystallization and growth in simple solution chemistry [22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In general, additives can be divided into several types: Organic molecules [25,[27][28][29]36,37], inorganic or ammonium salts [23,[30][31][32][33][34][35], polymers [26] and ionic liquids [22].…”

The 3 D Structure of Twisted Benzo[ghi]perylene‐Triimide Dimer as a Non‐Fullerene Acceptor for Inverted Perovskite Solar Cells

“…The J sc is even slightly higher than PC 61 BM/C 60 as ETL (J sc = 19.4 mA cm À2 )i no ur previous work. [44] When PDI-C4 was employed as second ETL along with t-BPTI, the champion device exhibited aP CE of 10.02 %, J sc of 18.56 mA cm À2 , V oc of 0.96 V, and FF of 56.04 % under the reverses can. The superior device performance of t-BPTI compared to BPTI can be attributed to the smooth and continuousm orphology of t-BPTI, which can fill the pinholes of perovsites forming af avorable interface with the perovskite, thus leadingt oe fficient charge transport.…”

“…The perovskite preparation process was same as that reported in our previous reports. [44] The uniform and dense, large grain size perovskite nanocrystals were prepared by atwo-step interdiffusion approach of spin coating PbI 2 incorporated with 0.75 %K Cl salt additive, followed by spin coating of MAI onto PbI 2 films. To evaluatet he potentialo fB PTIsa sa cceptors, we performed photoluminescence (PL) quenching experiments using perovskite as the donor.T he steady-state PL spectra of perovskite and bilayered perovskite/ETLs are shown in Figure S2.…”