Dual-absorption-layer Heterojunction Strategy for enhancing the photovoltaic performance of all-perovskite tandem solar cell DOI Open Access
Yuan Xiang,

张子发 Zhang Zifa,

Mingji Wang

и другие.

Acta Physica Sinica, Год журнала: 2025, Номер 74(14), С. 0 - 0

Опубликована: Янв. 1, 2025

Organic cations in hybrid organic-inorganic perovskite solar cells are susceptible to decomposition under high temperatures and ultraviolet light, leading a decline power conversion efficiency (PCE). All-inorganic exhibit both PCE superior photothermal stability, making them promising candidates for single-junction tandem photovoltaic applications. The mixed-halide CsPbI<sub>2</sub>Br has garnered significant attention as top cell semi-transparent owing its excellent thermal stability suitable bandgap (1.90 eV). Although the of CsPbI<sub>2</sub>Br-based is nearing theoretical limit, non-radiative recombination-induced energy losses remaining major barrier further performance enhancement. This recombination primarily caused by inadequate band alignment between absorption layer transport layer, resulting open-circuit voltage (<i>V</i><sub>OC</sub>) reduced short-circuit current density (<i>J</i><sub>SC</sub>). Two-dimensional passivation formed via solution processing could mitigate interfacial recombination, but it also impede efficient charge transport. Constructing three-dimensional structures not only provides an effective these limitations enhances sunlight facilitates carrier In this study, we propose Dual-absorption-layer Perovskite Heterojunction (DPHJ) strategy, which involves integrating staggered type-II heterojunction (p-pCsPbI<sub>2</sub>Br-CsPbIBr<sub>2</sub>) into all-perovskite cell. result simulation indicates that stacking 100 nm-thick CsPbIBr<sub>2</sub> atop 300 significantly device from 19.46% 22.29%. improvement attributed bending at CsPbI<sub>2</sub>Br/CsPbIBr<sub>2</sub> interface, built-in electric field, transport, suppresses within layer. Compared with utilizing single-absorption-layer cell, DPHJ-based increases <i>V</i><sub>OC</sub> (from 2.16 V 2.25 V) <i>J</i><sub>SC</sub> 15.96 mA<teshuzifu>×cm<sup>-2</sup> 16.76 mA<teshuzifu>×cm<sup>-2</sup>). As result, achieves 32.47%. addition, exhibits enhanced external quantum 500-580 nm wavelength range, be band-edge CsPbIBr<sub>2</sub>. generates more photogenerated carriers, thereby improving <i>J</i><sub>SC</sub>. results study surpass experimentally reported values cells. Further experimental show compared single-layer (<i>E</i><sub>2</sub>= 101.9 meV, electron-phonon coupling strength <i>γ</i><sub>ac</sub>=1.2×10<sup>-2</sup>，<i>γ</i><sub>LO</sub>=6.9×10<sup>3</sup>), double-absorption-layer film higher exciton binding 110.7 meV) (<i>γ</i><sub>ac</sub>=1.1×10<sup>-2</sup>，<i>γ</i><sub>LO</sub>=6.3×10<sup>3</sup>), helps suppress phase segregation optical stability—favorable fabricating long-term stable By focusing on design, work new insights guidance enhancing It presents versatile design concept optimizing layers multijunction expected drive advancements field.

Язык: Английский

Self-assembled hole-selective contact for efficient Sn-Pb perovskite solar cells and all-perovskite tandems DOI Creative Commons
Jingwei Zhu, Xiaozhen Huang, Yi Luo

и другие.

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 2, 2025

Self-assembled monolayers (SAMs) have displayed unpredictable potential in efficient perovskite solar cells (PSCs). Yet most of SAMs are largely suitable for pure Pb-based devices, precisely developing promising hole-selective contacts (HSCs) Sn-based PSCs and exploring the underlying general mechanism fundamentally desired. Here, based on prototypical donor-acceptor SAM MPA-BT-BA (BT), oligoether side chains with different length (i.e., methoxy, 2-methoxyethoxy, 2-(2-methoxyethoxy)ethoxy group) were custom-introduced benzothiadiazole unit to produce target acronyms MPA-MBT-BA (MBT), MPA-EBT-BA (EBT), MPA-MEBT-BA (MEBT), respectively, acting as HSCs Sn-Pb all-perovskite tandems. The introduction enables effectively accelerate hole extraction, regulate crystal growth passivate surface defects perovskites. In particular, benefiting from enhanced film quality suppressed interfacial non-radiative recombination losses, EBT-tailored LBG devices yield a champion efficiency 23.54%, enabling 28.61% monolithic tandems an impressive VOC 2.155 V excellent operational stability well 28.22%-efficiency 4-T development is highly desirable. authors report self-assembled achieve operationally stable

Язык: Английский

Процитировано

10
The progress and challenges of tin-lead alloyed perovskites: Toward the development of large-scale all-perovskite tandem solar cells DOI

Xiao Jia,

Dan Yang,

Dexu Zheng

и другие.

Chem, Год журнала: 2025, Номер 11(1), С. 102384 - 102384

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

4
Synergistic immobilization of ions in mixed tin-lead and all-perovskite tandem solar cells DOI Creative Commons
Yuhui Liu,

Tianshu Ma,

Changlei Wang

и другие.

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Апрель 11, 2025

Low-bandgap (LBG) mixed tin-lead (Sn-Pb) perovskite solar cells (PSCs) suffer from inferior performance due to their high defect density. Conventionally, ethylenediammonium diiodide (EDADI) is used as a surface passivator reduce defects and improve device photovoltaic performance, but it introduces severe hysteresis caused by excessive mobilized ions at the top interface. Here, we report mobile ion suppressing strategy of using hydrazine monohydrochloride (HM) bulk anchor free in LBG perovskites. The protonated (N2H5+) HM formed hydrogen bonds with iodine (I-) ions, while chloride (Cl-) occupied I- vacancies, collectively impeding migration thus mitigating movement-induced that arose EDADI usage. synergistic doping post-treatment significantly suppresses oxidation Sn2+, decreases trap density, inhibits rapid crystallization perovskite. Consequently, achieved champion efficiency 23.21% for PSCs. Integrating these wide-bandgap PSCs into all-perovskite tandem yields 28.55% (certified 28.31%) negligible hysteresis.

Язык: Английский

Процитировано

2
Defects Mitigation and Charge Transport Promotion via a Multifunctional Lewis Base for Efficient 2D/3D Tin Perovskite Solar Cells DOI
Yali Chen, Kun Wang, Wei Chen

и другие.

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

Abstract Tin perovskite solar cells (PSCs) have garnered considerable attention as promising alternatives to lead PSCs due their lower toxicity and outstanding optoelectronic properties. However, efficiency stability, particularly in 2D/3D tin PSCs, are usually hindered by high defect densities inefficient carrier transport. In this study, a small‐molecule Lewis base with multiple functional groups‐cyanoacetohydrazide (CAH) is employed mitigate defects enhance charge transport PSCs. It revealed that the carbonyl, amine, cyano groups CAH form strong chemical bonds Sn 2+ ions, resulting synergetic coordination effects. Moreover, interaction between effectively regulates crystallization process of film, high‐quality film enhanced crystallinity, reduced density, modulated phase distribution. As result, optimized achieve remarkable power conversion 15.06%, marking one highest values for Furthermore, devices exhibit retaining 95% initial performance after 2000 h storage nitrogen atmosphere.

Язык: Английский

Процитировано

1
Sn‐Pb Perovskite with Strong Light and Oxygen Stability for All‐Perovskite Tandem Solar Cells DOI
Ming Yang, Yang Bai, Yuanyuan Meng

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 30, 2024

Abstract Research on mixed Sn‐Pb perovskite solar cells (PSCs) is gaining significant attention due to their potential for high efficiency in all‐perovskite tandem cells. However, Sn 2+ susceptible oxidation, leading a defect density. The oxidation primarily occurs through two pathways: one involving reaction with oxygen, and the other related iodine defects, which generate I 2 further accelerate of ⁺, greatly reducing stability. First, tackle photo‐stability issues caused by amber acid (AA) screened as additive. Carboxyl group AA can strongly coordinate , reinforcing Sn─I bond electrostatically interacting negatively charged defects. This interaction inhibits photoinduced formation subsequent thereby enhancing stability Sn─Pb PSCs under continuous illumination. Building foundation AA, reductive sulfhydryl introduced synthesize thiomalic (TA). It 4+ both precursor film, improving air while maintaining strong photostability. Consequently, single achieved champion 22.7%. best‐performing two‐terminal cell power conversion 28.6% improved operational

Язык: Английский

Процитировано

6
Toward Commercial-Scale Perovskite Solar Cells: The Role of ALD-SnO2 Buffer Layers in Performance and Stability DOI

Ai Lan,

Hong Lü, Bin Huang

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(47), С. 64825 - 64833

Опубликована: Ноя. 13, 2024

Hybrid organic–inorganic perovskite solar cells (PSCs) have shown significant potential in photovoltaic applications due to their superior optoelectronic properties. However, the conventional electron transport layer (ETL) of C60 PSCs poses challenges such as incomplete coverage and metal diffusion, leading reduced performance stability. This work explores efficacy atomic deposition (ALD) SnO2 an interlayer between electrode enhance stability devices. Devices with varying thicknesses were fabricated, revealing that a 15 nm ALD-SnO2 optimally improved power conversion efficiency (PCE) 23.85%, compared 22.86% achieved BCP layer. Moreover, SnO2-based devices exhibited open-circuit voltage (VOC), short-circuit current density (JSC), fill factor (FF). Modules (30 × 30 cm) demonstrated notable enhancements uniformity, suggesting for scalable commercial applications. Photoluminescence (PL) electrochemical impedance spectroscopy (EIS) analyses confirmed charge extraction recombination buffer research indicates is promising candidate PSCs, providing pathway toward higher technology.

Язык: Английский

Процитировано

5
Heterogeneous Amine with Polycyclic‐Aromatics‐Modified Hole Transport Material for Efficient and Operationally Durable Perovskite Solar Cells DOI Open Access

Yang Luo,

Tianyu Li,

Lifei He

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 10, 2024

Abstract Achieving efficient perovskite solar cells (PSCs) with high operational durability is a challenging task. Here, by exploiting the heterogeneous amine strategy at molecular level, novel spirobifluorene derivative bearing methoxynaphthalene and 9,9‐dimethylfluorene peripheral groups ( N 2 , 2′ 7 7′ ‐tetrakis(9,9‐dimethyl‐9 H ‐fluoren‐2‐yl)‐ ‐tetrakis(6‐methoxynaphthalen‐2‐yl)‐9,9′‐spirobi[fluorene]‐2,2′,7,7′‐tetraamine, denoted as Spiro‐NADF) hole transport material (HTM) developed to address efficiency issues of PSCs. Compared 2,2′,7,7′‐tetrakis( ‐di‐ p ‐methoxyphenyl)‐amine‐9,9′‐spirobifluorene, Spiro‐NADF exhibits not only favorable energy level alignment but also higher glass transition temperature strong adhesion perovskite. Moreover, Spiro‐NADF‐based layer shows excellent morphological stability in devices against damp heat stress. These advantages reduce voltage loss suppress decomposition ion migration. Consequently, PSCs based on exhibit champion 24.66% an open‐circuit 1.19 V. The corresponding show greatly enhanced harsh environments, retaining over 92% initial efficiencies for 500 h aging under test (85 °C 70–90% relative humidity) illumination maximum power point tracking, respectively. This work demonstrates that engineering HTMs using amines polycyclic aromatics leaves considerable room developing stable

Язык: Английский

Процитировано

3
Design of photovoltaic materials assisted by machine learning and the mechanical tunability under micro-strain DOI
Ziyi Zhang, Songya Wang, Changcheng Chen

и другие.

Journal of Material Science and Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0
Synergic passivation of the interface between TiO2 and perovskite by multifunctional small molecules DOI

Yanbin Chen,

Yu Zhang,

Xianghan Li

и другие.

Applied Physics Letters, Год журнала: 2025, Номер 126(11)

Опубликована: Март 1, 2025

Titanium dioxide (TiO2) is widely employed as an electron transport layer in perovskite solar cells due to its low manufacturing cost and favorable energy-level alignment. However, the suboptimal quality of TiO2 films presence multiple defects at TiO2/perovskite interface, such uncoordinated Pb2+ oxygen vacancy defects, significantly compromise both device efficiency stability. This study proposes a synergistic passivation strategy through introduction acetylamino-functionalized interlayer between TiO2. The acetylamino groups within establish strong interactions with perovskite, thereby enhancing interface Acetylamino can also interact by bonding Ti4+ reducing potential layer. enhanced hydrophobicity film, induced layer, further promotes crystallization minimizing surface tension effects during film growth. Therefore, increased from 16.49% 19.26%. lifetime unencapsulated was evaluated under environmental conditions (relative humidity: 30% ± 5%, temperature: 25 5 °C). unmodified decreased 75.3% after 800 h, whereas modified maintained 90.1% initial efficiency, demonstrating higher

Язык: Английский

Процитировано

0
Enhanced buried interface behaviors for high-performance Sn-Pb perovskite solar cells DOI
Peng Jiang, Qing Gao, Jingwei Zhu

и другие.

Journal of Energy Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0