A low-cost hole transport layer enables CsPbI2Br single-junction and tandem perovskite solar cells with record efficiencies of 17.8 % and 21.4 %

Nano Today, Journal Year: 2022, Volume and Issue: 46, P. 101586 - 101586

Published: Aug. 17, 2022

Language: Английский

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Polishing the Lead‐Poor Surface for Efficient Inverted CsPbI₃ Perovskite Solar Cells

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(38)

Published: Aug. 2, 2022

Triiodide cesium lead perovskite (CsPbI3 ) has promising prospects in the development of efficient and stable photovoltaics both single-junction tandem structures. However, achieving inverted devices that provide good stability are compatible to remains a challenge, deep insights still not understood. This study finds surface components CsPbI3 intrinsically lead-poor relevant traps p-type with localized states. These deep-energy-level p induce inferior transfer or electrons serious nonradiative recombination at /PCBM interface, leading considerable open-circuit voltage (Voc loss reduction fill factor (FF). Compared molecular passivation, polishing treatment 1,4-butanediamine can eliminate nonstoichiometric root these for superior electron transfer. The significantly improves FF Voc photovoltaics, creating an efficiency promotion from 12.64% 19.84%. Moreover, 95% initial optimized is maintained after output operation 1000 h.

Language: Английский

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Progress and Perspective on Inorganic CsPbI₂Br Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(40)

Published: Sept. 1, 2022

Abstract Over the past few years, all‐inorganic perovskite solar cells (PSCs), especially CsPbI 2 Br PSCs, have received much attention because of their excellent thermal stability and a suitable trade‐off between light absorption higher phase among family inorganic perovskites. In this progress report, realization highly efficient stable PSCs is summarized through preparation process, additive engineering, interface modification, transport material selection. Furthermore, application in tandem its large‐area development are highlighted. Finally, challenges outlook discussed for further performance improvement future practical deployment.

Language: Английский

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Mitigating Surface Deficiencies of Perovskite Single Crystals Enables Efficient Solar Cells with Enhanced Moisture and Reverse‐Bias Stability

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(22)

Published: Feb. 22, 2023

Abstract Metal halide perovskite single crystals are promising for diverse optoelectronic applications due to their outstanding properties. In comparison the bulk, crystal surface suffers from high defect density and is moisture sensitive; however, modification strategies of relatively deficient. Herein, solar cells based on methylammonium lead triiodide (MAPbI 3 ) thin selected as a prototype improve single‐crystal devices by modification. The trap passivation protection against MAPbI achieved one bifunctional molecule 3‐mercaptopropyl(dimethoxy)methylsilane (MDMS). sulfur atom MDMS can coordinate with bare Pb 2+ reduce nonradiative recombination. As result, modified show remarkable efficiency 22.2%, which highest value cells. Moreover, mitigates ion migration, leading enhanced reverse‐bias stability. Finally, cross‐link silane molecules forms protective layer surface, results in stability both materials devices. This work provides an effective way crystals, important improving performance cells, photodetectors, X‐ray detectors, etc.

Language: Английский

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Highly Efficient and Air‐Stable Inorganic Perovskite Solar Cells Enabled by Polylactic Acid Modification

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(32)

Published: July 23, 2023

Abstract Inorganic perovskite solar cells (PSCs) suffer from serious carrier recombination and open‐circuit voltage loss because of surface defects unfavorable energy level alignment. Herein, a polylactic acid (PLA) modification approach to improve the performance mixed‐halide inorganic perovskites is reported. First, are effectively passivated through strong interaction between C═O in PLA undercoordinated Pb 2+ . Second, secondary grain growth induced by modification, resulting larger sizes. Third, makes region change n‐ p‐type, favoring charge transport hole layer (HTL). The modified films enable PSCs with less nonradiative lower loss. Consequently, record PCEs 19.12% 18.05% achieved for CsPbI 2.25 Br 0.75 2 PSCs, respectively. PSC an active area 1 cm shows PCE 16.41%. A 14.70% HTL‐free carbon electrode. In addition, significantly improved air stability due hydrophobic coating. This work suggests that effective achieving efficient, stable, scalable, low‐cost PSCs.

Language: Английский

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Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(3), P. 862 - 888

Published: Jan. 1, 2023

This review provides fundamental knowledge of inorganic CsPbI 2 Br perovskites and up-to-date/cutting-edge in solar cell applications.

Language: Английский

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In Situ Dual‐Interface Passivation Strategy Enables The Efficiency of Formamidinium Perovskite Solar Cells Over 25%

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(6)

Published: Oct. 28, 2023

Abstract Perovskite solar cells (PSCs) are promising candidates for next‐generation photovoltaics owing to their unparalleled power conversion efficiencies (PCEs). Currently, approaches further improve device tend focus on the passivation of interfacial defects. Although various strategies have been developed mitigate these defects, many involve complex and time‐consuming post‐treatment processes, thereby hindering widespread adoption in commercial applications. In this work, a concise but efficient situ dual‐interface strategy is wherein 1‐butyl‐3‐methylimidazolium methanesulfonate (MS) employed as precursor additive. During perovskite crystallization, MS can either be enriched downward through precipitation with SnO 2 , or aggregated upward lattice extrusion. These self‐assembled species play significant role passivating defect interfaces, reducing nonradiative recombination losses, promoting more charge extraction. As result, PCE >25% (certified 24.84%) achieved substantially improved long‐term storage photothermal stabilities. This provides valuable insights into holds promise industrialization PSCs.

Language: Английский

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Surface Defects Management by In Situ Etching with Methanol for Efficient Inverted Inorganic Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(23)

Published: March 15, 2023

Abstract Inorganic perovskite solar cells (IPSCs) have developed rapidly due to their good thermal stability and the bandgap suitable for perovskite/silicon tandem cells. However, large open‐circuit voltage (V OC ) deficit derived from surface defects energy level structure mismatch impede development of device performance, especially in P‐I‐N IPSCs. Herein, an innovative situ etching (ISE) treatment method is proposed reduce through methanol without additional passivator. It found that films treated with result a slight excess PbI 2 on inserted into grain boundaries. Therefore, successful decrease by passivation boundary greatly trap density films. And larger work function contributes band bending downward forms gradient alignment at I/N interface, which accelerates extraction charge carriers. As result, efficiency CsPbI 2.85 Br 0.15 inverted IPSC enhanced 16.00% 19.34%, one mostly efficient This provides original idea passivator manage inorganic perovskite.

Language: Английский

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Synergistic Crystallization Kinetics Modulation and Deep/Shallow Level Defect Passivation via an Organometallic Cobaltocenium Salt Toward High‐Performance Inverted Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(8)

Published: Jan. 9, 2024

Abstract Numerous deep/shallow level defects generated at the surface/grain boundaries of perovskite during uncontrollable crystallization pose a formidable challenge to photovoltaic performance solar cells (PSCs). Herein, an organometallic cobaltocenium salt additive, 1‐propanol‐2‐(1,2,3‐triazol‐4‐yl) hexafluorophosphate (PTCoPF 6 ), is incorporated into precursor solution regulate and minimize holistic for high‐performance inverted PSCs. The cations PF − in PTCoPF stabilize Pb‐I framework repair shallow‐level positively negatively charged vacancies perovskite. N═N triazole ring can passivate deep‐level uncoordinated lead. interaction between materials delays nucleation crystal growth, ensuring high‐quality with large grains, suppressing non‐radiative recombination ion migration. Therefore, ‐incorporated PSC achieves impressive power conversion efficiency 25.03% outstanding long‐term stability. Unencapsulated encapsulated PSCs maintain 93% 95% their initial efficiencies under 85 °C storage nitrogen atmosphere 1000 h maximum point tracking nearly h, respectively. Synergistic kinetic modulation defect passivation ionized metal‐organic complex additives will become prevalent methods improve stability

Language: Английский

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Annual research review of perovskite solar cells in 2023

Materials Futures, Journal Year: 2024, Volume and Issue: 3(2), P. 022102 - 022102

Published: April 24, 2024

Abstract Perovskite (PVK) solar cells (PSCs) have garnered considerable research interest owing to their cost-effectiveness and high efficiency. A systematic annual review of the on PSCs is essential for gaining a comprehensive understanding current trends. Herein, analysis papers reporting key findings in 2023 was conducted. Based results, were categorized into six classifications, including regular n–i–p PSCs, inverted p–i–n PVK-based tandem cells, PVK modules, device stability, lead toxicity green solvents. Subsequently, detailed overview summary advancements within each classification presented. Overall, this serves as valuable resource guiding future endeavors field PSCs.

Language: Английский

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