Boosting the Performance of Carbon‐Based Hole‐Transport‐Layer‐Free CsPbI2Br Solar Cells by Adding Imidazole Small Molecules DOI
Hai Liu, Xueyan Ma, Wenxuan Li

et al.

Progress in Photovoltaics Research and Applications, Journal Year: 2025, Volume and Issue: unknown

Published: May 10, 2025

ABSTRACT Carbon‐based hole‐transport‐layer (HTL)‐free CsPbI 2 Br solar cells have attracted considerable interest due to the improved stability, simple structure, rich application scenarios, and low cost, as compared with their organic–inorganic hybrid counterparts. However, uncoordinated Pb 2+ mobile I − ions impose challenges for fabricating a cell good comprehensive performance. To address related issues, herein, we introduce facile additive strategy using an organic small molecule material, i.e., 1H‐imidazole‐4‐carboxylic acid (ICA), improve performance of carbon‐based HTL‐free cells. Benefitting from effective passivation anchoring , well increased crystallinity reduced surface roughness layers by ICA, optimal delivers power conversion efficiency (PCE) 14.71%, ⁓24.7% increment relative PCE 11.80% control device without ICA addition. Moreover, ICA‐added exhibits evidently hysteresis current–voltage characteristics notably enhanced in contrast device.

Language: Английский

Methylammonium-free, high-efficiency, and stable all-perovskite tandem solar cells enabled by multifunctional rubidium acetate DOI Creative Commons
Xufeng Liao,

Xuefei Jia,

Weisheng Li

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 30, 2025

All-perovskite tandem solar cells (APTSCs) offer the potential to surpass Shockley-Queisser limit of single-junction at low cost. However, high-performance APTSCs contain unstable methylammonium (MA) cation in tin-lead (Sn-Pb) narrow bandgap subcells. Currently, MA-free Sn-Pb perovskite (PSCs) show lower performance compared with their MA-containing counterparts. This is due high trap density associated Sn2+ oxidation, which exacerbated by rapid crystallization Sn-containing perovskite. Here, a multifunctional additive rubidium acetate (RbAC) proposed passivate We find that RbAC can suppress alleviate microstrain, and improve crystallinity Consequently, resultant PSCs achieve power conversion efficiency (PCE) 23.02%, an open circuit voltage (Voc) 0.897 V, filling factor (FF) 80.64%, more importantly stability device significantly improved. When further integrated 1.79-electron volt wide-bandgap PSC, 29.33% (certified 28.11%) efficient Voc 2.22 volts achieved. The tin (II) oxidation impacts cation-free cells. authors employ for defect passivation stable all-perovskite

Language: Английский

Citations

3
Challenges and Perspectives toward Wide-Bandgap Perovskite Subcell in Four-terminal All-Perovskite Tandem Solar Cells DOI Creative Commons
Hongling Guan,

Shiqiang Fu,

Weiqing Chen

et al.

DeCarbon, Journal Year: 2025, Volume and Issue: unknown, P. 100098 - 100098

Published: Jan. 1, 2025

Language: Английский

Citations

1
Dipolar Carbazole Ammonium for Broadened Electric Field Distribution in High-Performance Perovskite Solar Cells DOI
Jialin Wang, Likai Zheng,

Hak-Beom Kim

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Perovskite solar cells (PSCs) with ammonium passivation exhibit superior device performance and stability. Beyond typical chemical passivation, salts control the electronic structure of perovskite surfaces, yet molecular structure–property relationship requires further understanding, especially dipole effect. Here, we employed carbazole its halogenated counterpart as functional group salts. 2-Chloro-carbazol-9-ethylammonium iodide (CzCl-EAI) a rigid, conjugated provides enhances ambient stability perovskites. In addition, found that halogenation intramolecular charge transfer for larger moment, leading to depletion region films threefold wider than PDAI2 condition. The power conversion efficiency (PCE) inverted PSCs based on mixed reached 25.16% certified 24.35% under quasi-steady-state (QSS) measurement. Unencapsulated devices retained over 91% initial PCE ISOS-D-2 conditions 1100 h maintained 80% their after 500 continuous light illumination in air 50–60% relative humidity (RH).

Language: Английский

Citations

1
Unveiling the Influence Mechanisms of Halogen Ion Exchange Reaction Kinetic on the Stability of the Perovskite Cspbbrx(Cl or I)3-X Nanocrystals DOI
Miao Zhang, Lei Gu, Jingyun Zhang

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Regulating Crystallization for Pure-Iodide 1.68 eV Bandgap Perovskite Solar Cells with a Fill Factor over 86% DOI

Xiangqing Zhou,

Xingliang Li, Biao Shi

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Mixed halide wide-bandgap (WBG) perovskites, widely used as a top-cell absorber in tandem solar cells, exhibit severe photoinduced phase segregation. A feasible solution is to exploit pure-iodide WBG essentially increasing Cs content instead of Br achieve bandgap widening. However, the efficiency pure-iodine perovskite cells (PSCs) reported so far has been inferior that typical mixed PSCs due complex nucleation and transition processes, leading poor crystallization quality high density defect states perovskites. Here, by combining lead thiocyanate (Pb(SCN)2) oleylamine hydrochloride (OAmCl) with Cs0.3DMA0.2MA0.5PbI3 precursor, homogeneous distribution obtained, resulting enhanced reduction excess source defects. With this approach, film improved along fewer surface-bulk defects well beneficial surface electronic properties. As result, deliver 21.55%, an extremely fill factor 86.03%, superior photostability. The target fundamentally free segregation under continuous light for 12 h (AM 1.5 G illumination, xenon lamp, 1 sun).

Language: Английский

Citations

0
Machine Learning-Assisted Prediction and Control of Bandgap for Organic–Inorganic Metal Halide Perovskites DOI

Fuchun Gou,

Zhu Ma,

Qiang Yang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Perovskite materials have wide application prospects in many fields due to their tunable and designable band gap characteristics. Machine learning has obvious advantages quickly effectively discovering new materials. However, noise interference within data sets frequently hinders the ability of traditional predictive evaluative techniques satisfy practical requirements. This study introduces an outlier removal strategy examine influence varying degrees exclusion on generalization performance model followed by determination optimal configuration. The results indicated that gradient boosting regression tree (GBRT) algorithm yielded a mean absolute error (MAE) 0.0287, squared (MSE) 0.0014, root (RMSE) 0.0377, R-squared (R2) value 0.979, demonstrating superior with minimal prediction compared alternative algorithms. Moreover, Shapley Additive Explanation (SHAP) method was utilized elucidate impact various chemical compositions desired gap, revealing ratio I exerts most significant influence, Pb, Br, Sn ratios exerting subsequent effect. We further investigated effect different composition experimental show individual elements maintain stability particular proportionate bounds, thereby offering critical underpin control strategies. provides valuable insights for realizing accurate effective gaps.

Language: Английский

Citations

0
Enhancing Stability in 1.78 eV Wide-Bandgap Inverted Perovskite Solar Cells via GlyHCl-Induced Inhibition of Phase Segregation DOI
Xinyu Zhao, Weisheng Li,

Xuefei Jia

et al.

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112294 - 112294

Published: March 1, 2025

Language: Английский

Citations

0
Unveiling the influence mechanisms of halogen ion exchange reaction kinetic on the stability of the perovskite CsPbBrx(Cl or I)3-x nanocrystals DOI
Miao Zhang, Lei Gu, Jingyun Zhang

et al.

Journal of Luminescence, Journal Year: 2025, Volume and Issue: unknown, P. 121204 - 121204

Published: March 1, 2025

Language: Английский

Citations

0
Buried Interface Regulation with a Supramolecular Assembled Template Enables High‐Performance Perovskite Solar Cells for Minimizing the VOC Deficit DOI Creative Commons

Zhenrong Wang,

Qiong Liang, Mingliang Li

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract Despite the rapid development of perovskite solar cells (PSCs) in past decade, open‐circuit voltage ( V OC ) PSCs still lags behind theoretical Shockley–Queisser limit. Energy‐level mismatch and unwanted nonradiative recombination at key interfaces are main factors detrimental to . Herein, a crystallization‐driven template is constructed SnO 2 /perovskite buried interface through self‐assembled amphiphilic phosphonate derivative. The highly oriented supramolecular grows from an evolutionary selection growth via solid–solid phase transition. This strategy induces crystallization into preferred (100) orientation toward out‐of‐plane direction facilitated carrier extraction transfer due elimination energy barrier. self‐assembly process positively passivates intrinsic surface defects functionalized moieties, marked contrast passive effect achieved incidental contacts conventional passivation methods. As result, with modification exhibit promising PCE 25.34%, maximum 1.23 V, corresponding mere 0.306 deficit (for bandgap 1.536 eV), reaching 97.2% spontaneously improves long‐term operational stability under thermal moisture stress (ISOS‐L‐3: MPP, 65 °C, 50% RH, T 92 lifetime exceeding 1200 h).

Language: Английский

Citations

0
Unveiling the Influence Mechanisms of Halogen Ion Exchange Reaction Kinetic on the Stability of the Perovskite Cspbbrx(Cl or I)3-X Nanocrystals DOI
Miao Zhang, Lei Gu, Jingyun Zhang

et al.

Published: Jan. 1, 2025

The electronic structure of lead-halide perovskite nanocrystals (NCs) could be tailored to enable the tunable photoluminescence (PL) in window from ultraviolet-visible-near infrared by halogen ion exchange reaction, which has been considered as most effective and convenient post-treatment method for manipulating chemical composition perovskite. However, NCs with such are generally not stable, mechanism how reaction kinetic influences stability well demonstrated. In this work, we show that Cl diffusion limited process CsPbBr3 is dependent on concentration solution, Br/Cl relatively gentle ordered, give rises a stable blue CsPbBrxCl3-x NCs. competition between rapid alloy segregation occurs CsPbBrxI3-x red NCs, responsible degradation showing quenched PL emission after reaction. This work presents view interrelationship facilitates understand further improve its optoelectronic devices.

Language: Английский

Citations

0