Enhancing the Efficiency and Stability of CsFA‐Based Perovskite Solar Cells: Defect Passivation Using Indoline‐Based D–π–A Configured Molecule as Additive DOI

Zaixin Zhang,

Yongjie Cui, G. Chen

et al.

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

Published: April 25, 2025

ABSTRACT The employment of rationally designed functional group‐bearing molecules as additives to passivate perovskite defects has emerged a prevalent trend. Among the diverse array passivation materials, donor‐π‐acceptor (D‐π‐A) structured have attracted widespread attention due their unique ability simultaneously regulate electron donor and acceptor units, thereby promoting coordination with undercoordinated ions films. In this work, we introduce an indoline‐based D‐π‐A molecule (labeled IHT) efficient passivator for solar cells (PSCs). extraordinary electron‐donating capability indoline moiety endows electron‐withdrawing cyanoacetic acid group elevated density, which is in favor interaction under‐coordinated Pb 2+ lattice, thus reducing density defective states within Experimental outcomes underscore efficacy IHT additive passivating CsFA‐based PSCs. optimal devices demonstrate remarkable champion photovoltaic conversion efficiency 21.25%, notable improvement 7.4% compared Cs‐FA‐PbI 3 devices. stability assessments reveal that unencapsulated IHT‐treated retained 83% initial after 30 days ambient air, whereas untreated exhibited decline 54% under same condition. This work indicates profound significance formation dense film effect well enhancing long‐term

Language: Английский

Thermal management towards ultra-bright and stable perovskite nanocrystal-based pure red light-emitting diodes DOI Creative Commons

Hongjin Li,

Xiaofang Zhu,

Dingshuo Zhang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 2, 2024

Despite the promising candidacy of perovskite nanocrystals for light-emitting diodes, their pure red electroluminescence is hindered by low saturated luminance, severe external quantum efficiency roll-off, and inferior operational stability. Here, we report ultra-bright stable diodes manipulating Joule heat generation in nanocrystal emissive layer thermal management within device. Diphenylphosphoryl azide-mediated regulation surface synergistically enhances optical properties carrier transport layer, enabling reduced thus lowering working temperature. These merits inhibit ion migration CsPb(Br/I)3 film, excellent spectra Combined with highly thermal-conductive sapphire substrates implementation pulse-driving mode, exhibit an luminance 390,000 cd m-2, a peak 25%, suppressed half-life 20 hours, superior spectral stability 15 A cm-2.

Language: Английский

Citations

19
A Novel Organic Phosphonate Additive Induced Stable and Efficient Perovskite Solar Cells with Efficiency over 24% Enabled by Synergetic Crystallization Promotion and Defect Passivation DOI

Caidong Cheng,

Yiguo Yao,

Lei Li

et al.

Nano Letters, Journal Year: 2023, Volume and Issue: 23(19), P. 8850 - 8859

Published: Sept. 25, 2023

Defect passivation is crucial to enhancing the performance of perovskite solar cells (PSCs). In this study, we successfully synthesized a novel organic compound named DPPO, which consists double phosphonate group. Subsequently, incorporated DPPO into solution. The presence P═O group interacting with undercoordinated Pb2+ yielded film superior crystallinity, greater crystal orientation, and smoother surface. Additionally, addition can passivate defect states enhance upper layer energy level alignment, will improve carrier extraction prevent nonradiative recombination. Consequently, an impressive champion efficiency 24.24% was achieved minimized hysteresis. Furthermore, DPPO-modified PSCs exhibit enhanced durability when exposed ambient conditions, maintaining 95% initial for 1920 h at average relative humidity (RH) 30%.

Language: Английский

Citations

36
Color‐Stable Two‐Dimensional Tin‐Based Perovskite Light‐Emitting Diodes: Passivation Effects of Diphenylphosphine Oxide Derivatives DOI
Chenhui Wang,

Siqi Cui,

Yangyang Ju

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(29)

Published: April 25, 2023

Abstract The performance of tin (Sn)‐based perovskite light‐emitting diodes (PeLEDs) lags behind their lead analogs due to the challenges Sn 2+ oxidation, defect passivation, and fast crystallization. Herein, passivation effects diphenylphosphine oxide (DPPO) derivatives on fabrication PEA 2 SnI 4 films are investigated. DPPO with hydroxyl group, or including substituent group potential form unfavorable passivators positive in accelerating oxidation. In comparison, amino‐functionalized molecule is an effective additive enhance photoluminescence as well crystallinity improvement. Based optimized films, color‐stable pure‐red PeLEDs demonstrated a full width at half maximum 23 nm 630 nm, luminance 451 cd m −2 , external quantum efficiency 3.51%, half‐lifetime 13.7 min 102 . This work opens new prospects selection molecular additives for Sn‐based perovskites.

Language: Английский

Citations

31
Highly Efficient Hybrid Perovskite/Organic Tandem White Light Emitting‐Diodes with External Quantum Efficiency Exceeding 20% DOI Open Access

Shuang‐Qiao Sun,

Yating Cai,

Min Zhu

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(51)

Published: Aug. 8, 2023

Abstract Perovskite light‐emitting diodes (PeLEDs) have shown great potential for low‐cost display and lighting technologies, all‐inorganic blue PeLEDs are recognized as a promising substitute fluorescent/phosphorescent organic (OLEDs) owing to their superior color purity stability potential. However, confined by the solution fabrication process, depositing multi‐layered white remains challenge. Here, newly designed hybrid perovskite/organic tandem LED (POTWLED), integrated with bottom PeLED unit top orange/(orange + red) OLED unit, prevent damage underlying perovskite layer caused deposition of emitting layers, is reported. To optimize performance POTWLEDs, conductive passivator 2,8‐bis(diphenylphosphoryl)dibenzo[b,d] thiophene, strong surface binding group P═O, introduced passivate defects, which promotes maximum external quantum efficiency (EQE) 17.3% an emission peak at 488 nm. As result, based on optimized units, EQE 23.9% low temperature 2522 K obtained highest perovskite‐based WLEDs, illustrating device in fabricating high‐performance WLEDs.

Language: Английский

Citations

25
An efficient NiO/NiS/NiP heterostructure catalyst for oxygen evolution reaction DOI

Syed Hammad Gillani,

Muhammad Sohail, Lamia Abu El Maati

et al.

Journal of Alloys and Compounds, Journal Year: 2023, Volume and Issue: 976, P. 172931 - 172931

Published: Nov. 21, 2023

Language: Английский

Citations

24
Ordered Phase Distribution of Quasi‐2D Perovskites Controlled by a Supramolecular Approach Enables Efficient Blue Light‐Emitting Diodes DOI
Shichen Yuan, Tao Fang,

Boning Han

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(25)

Published: Feb. 21, 2024

Abstract Quasi‐2D perovskites demonstrate exceptional luminescent properties, mainly attributed to heightened radiative recombination facilitated by the energy transfer process among spontaneous quantum‐well structures featuring varied n‐value distributions. However, rapid crystallization often induces uncontrolled variations in phase composition, characterized distinct “n” values, leading suboptimal efficiency. In this study, an innovative supramolecular strategy utilizing cryptand is introduced as additive regulate distribution within quasi‐2D perovskite films. Cryptand effectively inhibited aggregation of PEA + and formation unsaturated Pb‐X coordination compounds, thereby suppressing generation low‐“n” phases. This intervention resulted a continuous series ordered intermediate phases with higher values. The graded electronic structure efficient from high‐“n” phases, promoting effective radiation recombination. As result, optimized PeLEDs emitting at 490 nm demonstrated remarkable external quantum efficiency (EQE) enhancement 10.16%, compared reference device EQE 2.33%. also exhibited impressive spectral operational stability. findings establish viable for precise regulation perovskites, offering great potential high‐performance blue PeLEDs.

Language: Английский

Citations

13
Ligand Strategy for Perovskite Displays: A Review DOI
Xiang Zhang,

Junhu Cai,

Longwen Yang

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(4), P. 1587 - 1603

Published: March 19, 2024

Metal halide perovskites (MHPs) have demonstrated remarkable performance with efficient luminescence and color tunability, which potentially replace traditional luminescent materials in up-to-date display technology. However, MHPs still face serious challenges stability efficiency for applications. The ligand strategy is currently one of the most effective approaches comprehensive improvement perovskite displays (Pe-displays). This paper reviews recent progress Pe-displays from perspective years, has never been emphasized before. First, defect types are summarized to boost further understanding MHPs. detailed strategies different site defects then reviewed purpose work. Finally, outlooks raised promote study commercialization next-generation Pe-displays. review comprehensively focuses on that can be widely extended applications emerging displays.

Language: Английский

Citations

12
Suppressing the Bottom Small n Phases of Quasi-2D Perovskites for High-Performance Photovoltaic Applications DOI
W. B. Qian, Shijie Dai, Haoliang Wang

et al.

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

Published: March 5, 2025

The bottom small n phases in quasi-two-dimensional (Q-2D) perovskite films significantly hinder their photovoltaic performance development due to severely low conductivity and nonideal band alignment the corresponding solar cells. In this study, we successfully suppressed growth of Q-2D Ruddlesden-Popper (RP) (BA2MA4Pb5I16, ⟨n⟩ = 5) by introducing 2,7-bis(diphenylphosphoryl)-9,9'-spirobifluorene (SPPO13) as an additive into precursor solution. It is interesting find that hole transport layer poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) our p-i-n device can attract SPPO13 π-π stacking effect. As a result, concentrates at bottom, coordination between PbI2 leads more [PbI6]4- octahedra gathering downside film. Thereby, large remain unwanted are suppressed. optimized achieves remarkable power conversion efficiency 18.41%, which, according knowledge, highest value for BA-MA-based perovskite. Moreover, also demonstrates outstanding stability, maintaining 99.5% 95.3% initial after being stored over 3500 h under maximum point tracking operation 400 h, respectively. Unlike conventional methods primarily address bulk or interface properties, approach uniquely combines effects defect passivation through phosphine oxide groups, leading enhanced crystallinity, vertical orientation, nonradiative recombination. This work provides new regulate n-phase promote behavior

Language: Английский

Citations

1
Realizing High Brightness Quasi‐2D Perovskite Light‐Emitting Diodes with Reduced Efficiency Roll‐Off via Multifunctional Interface Engineering DOI Creative Commons

Yu‐Kuan Lin,

Chiung‐Han Chen,

Yen‐Yu Wang

et al.

Advanced Science, Journal Year: 2023, Volume and Issue: 10(26)

Published: July 3, 2023

Quasi-2D perovskites have recently flourished in the field of luminescence due to quantum-confinement effect and efficient energy transfer between different n phases resulting exceptional optical properties. However, owing lower conductivity poor charge injection, quasi-2D perovskite light-emitting diodes (PeLEDs) typically suffer from low brightness high-efficiency roll-off at high current densities compared 3D perovskite-based PeLEDs, which is undoubtedly one most critical issues this field. In work, PeLEDs with brightness, reduced trap density, low-efficiency are successfully demonstrated by introducing a thin layer conductive phosphine oxide perovskite/electron transport interface. The results surprisingly show that additional does not improve multiple film, but purely improves electronic properties On hand, it passivates surface defects film; on other promotes electron injection prevents hole leakage across As result, modified pure Cs-based device shows maximum > 70,000 cd m-2 (twice control device), external quantum efficiency (EQE) 10% much bias voltages.

Language: Английский

Citations

19
Self-assembled mono-hole-injecting layers towards efficient deep-blue perovskite light-emitting diodes DOI
Xin Zheng, Changting Wei, Shichen Yuan

et al.

Applied Surface Science, Journal Year: 2024, Volume and Issue: 655, P. 159643 - 159643

Published: Feb. 9, 2024

Language: Английский

Citations

7