Reduced 0.418 V <i>V</i><sub>OC</sub>-deficit of 1.73 eV wide-bandgap perovskite solar cells assisted by dual chlorides for efficient all-perovskite tandems

Zhao, Yue; Wang, Changlei; Ma, Tianshu; Zhou, Lei; Wu, Zhanghao; Wang, Huayang; Chen, Cong; Yu, Zhenhua; Sun, Weiwei; Wang, Aolin; Huang, Hao; Zou, B. S.; Zhao, Dewei; Li, Xiaofeng

doi:10.1039/d2ee04087e

Cited by 41 publications

(25 citation statements)

References 67 publications

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“…The higher built‐in electric field is conducive to driving the transport of photogenerated carriers and improving charge transfer and extraction, which is conducive to acquiring higher V OC . [ 9,51 ]…”

Section: Resultsmentioning

confidence: 99%

“…The higher built-in electric field is conducive to driving the transport of photogenerated carriers and improving charge transfer and extraction, which is conducive to acquiring higher V OC . [9,51] The inverted WBG PSCs were fabricated to evaluate the effect of TB treatment on device performance. Schematic of the perovskite solar cell device architecture we employ in Figure S22 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…[7][8] However, in inverted WBG mixed halide PSCs, the severe open circuit voltage (V OC ) deficit (defined as Eg/q−V OC ) poses a significant challenge in achieving both high PCE. [9] Such a large V OC deficit is considered to be caused by several factors, such as bulk and interface defects, photoinduced halide segregation, unmatched energy level alignment, etc. [10] For example, the halide segregation will produce a Br-rich perovskite region with high trap density and many deep-level defects, as well as an I-rich perovskite region that can become a charge recombination center and capture photogenerated carriers to prevent their transfer.…”

Section: Introductionmentioning

confidence: 99%

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Crystallization Regulation and Defect Passivation for Efficient Inverted Wide‐Bandgap Perovskite Solar Cells with over 21% Efficiency

Su,

Yu,

Dong

et al. 2023

Advanced Energy Materials

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Wide‐bandgap (WBG) perovskite solar cells (PSCs) have drawn great attention owing to their promising potential for constructing efficient tandem solar cells. However, the rapid crystallization results in poor film properties and easy formation of defects, thereby greatly restricting the acquisition of a small open‐circuit voltage (VOC) deficit due to the severe nonradiative recombination. Herein, it introduced the triethanolamine borate (TB) to effectively slow down the rapid crystallization for preparing highly crystalline and uniform WBG perovskite films with reduced defects. The strong intermolecular interaction (e.g., coordination and hydrogen bond) between TB and perovskite can suppress the halide vacancy formation and inhibit phase segregation for improving long‐term stability. The devices based on a 1.65 eV perovskite absorber achieved a high efficiency of 21.55% with a VOC of 1.24 V, demonstrating the VOC deficit is as low as 0.41 V, which is one of the lowest reports. By combining a semitransparent WBG subcell with a narrow‐bandgap tin‐based PSC, the four‐terminal tandem solar cell delivers a high efficiency of 26.48%.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Crystallization Regulation and Defect Passivation for Efficient Inverted Wide‐Bandgap Perovskite Solar Cells with over 21% Efficiency

Su,

Yu,

Dong

et al. 2023

Advanced Energy Materials

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“…Owing to the wider range of bandgap tunability of HPs (%1.18-2.3 eV), they have been used for tandem device configuration (TDC), both in all perovskite configurations and in hybrid with Si or CIGS cells. [32,230,261,262] Detailed-balance calculations have shown that the limiting efficiency of a tandem device, considering an infinite number of subcells, can reach a demonstrated power conversion efficiency (PCE) of up to 69.9% under standard 1 sun illumination. [263,264] In a tandem device, PCE depends on how the subcells are connected.…”

Section: Tandem Configuration-hpscsmentioning

confidence: 99%

Advancing Efficiency and Stability of Lead, Tin, and Lead/Tin Perovskite Solar Cells: Strategies and Perspectives

Khadka,

Shirai,

Yanagida

et al. 2023

Solar RRL

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Halide‐perovskite‐based solar cells (HPSCs) have established themselves as a promising photovoltaic (PV) technology in a remarkably short time. The rapid improvement in HPSCs can be attributed to the unique material and optoelectronic properties of metal halide perovskite semiconductors coupled with a very knowledgeable and experienced PV community. This review briefly summarizes the chemistry of halide perovskites, delving into the fundamental aspects of crystal structure and optical bandgap, followed by a more in‐depth report on the advancements in HPSCs efficiencies, thanks to structural regulation, interfacial modulation, and thin‐film engineering. It is mainly focused on three metal halide perovskites topics: 1) high‐performance Pb‐based perovskites, 2) Sn‐based perovskites and their associated challenges, and 3) emerging work on mixed composition Pb–Sn perovskites. For each of these domains, the effects stemming from the tuning of the monovalent A‐site and the halide site are examined. Additionally, various approaches aimed at passivating defects in the bulk film and at the interface, along with carrier transport engineering, are discussed. The discussions also encompass the broader implications for device performance, stability, and material toxicity. Finally, perspectives on the future directions and the commercial feasibility of perovskite photovoltaic technologies are provided.

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“…The details are demonstrated in the Experimental Section. Notably, considering the positive effect of chloride ions in improving the crystallization of perovskites, [46][47][48] chlorine ions were selected as anions for the ammonium salts. Figure S1 shows the molecular structures of PEACl and HACl 2 .…”

Section: Structure and Morphology Of Perovskitesmentioning

confidence: 99%

Modulating CsPbl₃ crystallization by using diammonium agent for efficient solar cells

Qiu,

Zhou,

et al. 2023

SusMat

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Cesium lead triiodide (CsPbI3) perovskite receives tremendous attention for photovoltaic applications, owing to its remarkable thermal stability and optoelectronic properties. However, realizing the CsPbI3 perovskite with high black‐phase stability and optoelectronic properties remains a significant challenge, which largely affects the photovoltaic performance of perovskite solar cells (PSCs). Herein, aromatic ammonium agents are used to modulate the crystallization of the CsPbI3 perovskite to improve its black‐phase stability and optoelectronic properties for efficient PSCs. Systemically experimental studies and comprehensively theoretical calculations are performed, which reveal that histammonium dihydrochloride (HACl2) could strongly couple with the perovskite during its crystallization, leading to faster nucleation and slower perovskite growth, and thus modulating the crystallization dynamics of the perovskites. Moreover, the residual diammonium cations (HA2+) distributed at the grain boundaries and on the surface of the perovskites can effectively passivate defects through electrostatic interactions, substantially suppressing trap‐assisted nonradiative recombination, and prompting more matched perovskite surface energetics. Consequently, the photovoltaic performance of CsPbI3 PSCs is largely improved because of a combination of enhanced crystallinity and optoelectronic properties of the perovskites. This work offers a new avenue to prepare inorganic perovskites with high optoelectronic properties for photovoltaics.

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Reduced 0.418 V V_OC-deficit of 1.73 eV wide-bandgap perovskite solar cells assisted by dual chlorides for efficient all-perovskite tandems

Abstract: Wide-bandgap (wide-Eg) perovskites with bandgaps over 1.65 eV have great potential in constructing tandem solar cells (TSCs), however, they still suffer from large open-circuit voltage (VOC) deficits. Phase segregation and...

Cited by 41 publications

References 67 publications

Crystallization Regulation and Defect Passivation for Efficient Inverted Wide‐Bandgap Perovskite Solar Cells with over 21% Efficiency

Crystallization Regulation and Defect Passivation for Efficient Inverted Wide‐Bandgap Perovskite Solar Cells with over 21% Efficiency

Advancing Efficiency and Stability of Lead, Tin, and Lead/Tin Perovskite Solar Cells: Strategies and Perspectives

Modulating CsPbl₃ crystallization by using diammonium agent for efficient solar cells

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Reduced 0.418 V VOC-deficit of 1.73 eV wide-bandgap perovskite solar cells assisted by dual chlorides for efficient all-perovskite tandems

Abstract: Wide-bandgap (wide-Eg) perovskites with bandgaps over 1.65 eV have great potential in constructing tandem solar cells (TSCs), however, they still suffer from large open-circuit voltage (VOC) deficits. Phase segregation and...

Cited by 41 publications

References 67 publications

Crystallization Regulation and Defect Passivation for Efficient Inverted Wide‐Bandgap Perovskite Solar Cells with over 21% Efficiency

Crystallization Regulation and Defect Passivation for Efficient Inverted Wide‐Bandgap Perovskite Solar Cells with over 21% Efficiency

Advancing Efficiency and Stability of Lead, Tin, and Lead/Tin Perovskite Solar Cells: Strategies and Perspectives

Modulating CsPbl3 crystallization by using diammonium agent for efficient solar cells

Contact Info

Product

Resources

About

Reduced 0.418 V V_OC-deficit of 1.73 eV wide-bandgap perovskite solar cells assisted by dual chlorides for efficient all-perovskite tandems

Modulating CsPbl₃ crystallization by using diammonium agent for efficient solar cells