Acceleration of radiative recombination for efficient perovskite LEDs

Nature, Год журнала: 2024, Номер 630(8017), С. 631 - 635

Опубликована: Май 29, 2024

The increasing demands for more efficient and brighter thin-film light-emitting diodes (LEDs) in flat-panel display solid-state lighting applications have promoted research into three-dimensional (3D) perovskites. These materials exhibit high charge mobilities low quantum efficiency droop

Язык: Английский

---

Co‐Self‐Assembled Monolayers Modified NiO_x for Stable Inverted Perovskite Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 11, 2024

Abstract [4‐(3,6‐dimethyl‐9H‐carbazol‐9yl)butyl]phosphonic acid (Me‐4PACz) self‐assembled molecules (SAM) are an effective method to solve the problem of buried interface NiO x in inverted perovskite solar cells (PSCs). However, Me‐4PACz end group (carbazole core) cannot forcefully passivate defects at bottom film. Here, a Co‐SAM strategy is employed modify PSCs. doped with phosphorylcholine chloride (PC) form improve monolayer coverage and reduce leakage current. The phosphate ions (Cl − ) PC can inhibit surface defects. Meantime, quaternary ammonium Cl fill organic cations halogen vacancies film enable passivation. Moreover, promote growth crystals, collaboratively defects, suppress nonradiative recombination, accelerate carrier transmission, relieve residual stress Consequently, modified devices show power conversion efficiencies as high 25.09% well excellent device stability 93% initial efficiency after 1000 h operation under one‐sun illumination. This work demonstrates novel approach for enhancing performance PSCs by modifying on .

Язык: Английский

---

Inhibition of Ion Migration for Highly Efficient and Stable Perovskite Solar Cells

Advanced Materials, Год журнала: 2023, Номер 35(52)

Опубликована: Апрель 17, 2023

Abstract In recent years, organic‐inorganic halide perovskites are now emerging as the most attractive alternatives for next‐generation photovoltaic devices, due to their excellent optoelectronic characteristics and low manufacturing cost. However, resultant perovskite solar cells (PVSCs) intrinsically unstable owing ion migration, which severely impedes performance enhancement, even with device encapsulation. There is no doubt that investigation of migration summarization advances in inhibition strategies necessary develop “state‐of‐the‐art” PVSCs high intrinsic stability accelerated commercialization. This review systematically elaborates on generation fundamental mechanisms PVSCs, impact hysteresis, phase segregation, operational stability, characterizations PVSCs. Then, many related works inhibiting toward highly efficient stable summarized. Finally, perspectives current obstacles prospective boost meet all requirements commercialization success

Язык: Английский

---

Dipolar Chemical Bridge Induced CsPbI₃ Perovskite Solar Cells with 21.86 % Efficiency

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(18)

Опубликована: Март 4, 2024

Abstract CsPbI 3 perovskite receives tremendous attention for photovoltaic applications due to its ideal band gap and good thermal stability. However, solar cells (PSCs) significantly suffer from photovoltage deficits because of serious interfacial energy losses within the PSCs, which a large extent affects performance PSCs. Herein, dipolar chemical bridge (DCB) is constructed between TiO 2 layers lower thus improve charge extraction The results reveal that DCB could form beneficial dipole layers, optimize energetics perovskite/TiO level alignment Meanwhile, also simultaneously passivate surface defects greatly lowering recombination. Consequently, deficit PSCs largely reduced, leading record efficiency 21.86 % being realized. operation stability improved high‐quality films with released tensile strain obtained after forming

Язык: Английский

---

In Situ and Operando Characterizations of Metal Halide Perovskite and Solar Cells: Insights from Lab-Sized Devices to Upscaling Processes

Chemical Reviews, Год журнала: 2023, Номер 123(6), С. 3160 - 3236

Опубликована: Март 6, 2023

The performance and stability of metal halide perovskite solar cells strongly depend on precursor materials deposition methods adopted during the layer preparation. There are often a number different formation pathways available when preparing films. Since precise pathway intermediary mechanisms affect resulting properties cells, in situ studies have been conducted to unravel involved evolution phases. These contributed development procedures improve structural, morphological, optoelectronic films move beyond spin-coating, with use scalable techniques. To explore degradation devices, operando subjected normal operating conditions, or stressed humidity, high temperatures, light radiation. This review presents an update using wide range imaging, spectroscopic techniques, involving formation/degradation perovskites. Operando also addressed, emphasizing latest results for cells. works demonstrate importance achieve level required scale-up consequent commercial deployment these

Язык: Английский

---

Challenges and opportunities for the mechanical reliability of metal halide perovskites and photovoltaics

Nature Energy, Год журнала: 2023, Номер 8(12), С. 1319 - 1327

Опубликована: Ноя. 30, 2023

Язык: Английский

---

Machine-Learning-Assisted Screening of Interface Passivation Materials for Perovskite Solar Cells

ACS Energy Letters, Год журнала: 2023, Номер 8(3), С. 1424 - 1433

Опубликована: Фев. 15, 2023

Interface passivation using an ammonium salt can effectively improve the power conversion efficiency (PCE) of perovskite solar cells (PSCs). Despite significant PCE improvement achieved in previous studies, selection criteria for salts are not fully understood. Here we apply a machine-learning (ML) method to investigate relationship between molecular features and PSCs. We establish ML model experimental data set 19 predict after passivation. Three (hydrogen bond donor, hydrogen atom, octane–water partition coefficient) identified as most important selecting The is further used screen from pool 112 PubChem database. FAMACs FAMA-based PSCs fabricated with model-recommended (2-phenylpropane-1-aminium iodide) achieve PCEs 22.36% 24.47%, respectively.

Язык: Английский

---

Beyond Imperfections: Exploring Defects for Breakthroughs in Perovskite Solar Cell Research

Advanced Energy Materials, Год журнала: 2023, Номер 14(6)

Опубликована: Дек. 21, 2023

Abstract The field of solar systems has undergone rapid development with the emergence special material, perovskite. Perovskite's unique mechanism, defect tolerance, enabled perovskite cells (PSCs) to achieve high power conversion efficiencies (PCEs), and many studies on this subject have been conducted. “Defect tolerance” indicates that defects in are primarily generated at shallow‐energy level do not occur through nonradiative recombination. However, also well formed films shallow can transform into deep traps, leading long‐term stability issues. Therefore, controlling is essential for developing PSCs PCEs. causes diverse, patterns differ considerably, particularly depending location PSCs. In review, will be discussed review several methods passivating them different.

Язык: Английский

---

Surface Reconstruction for Efficient and Stable Monolithic Perovskite/Silicon Tandem Solar Cells with Greatly Suppressed Residual Strain

Advanced Materials, Год журнала: 2023, Номер 35(30)

Опубликована: Апрель 20, 2023

Despite the swift rise in power conversion efficiency (PCE) to more than 32%, instability of perovskite/silicon tandem solar cells is still one key obstacles practical application and closely related residual strain perovskite films. Herein, a simple surface reconstruction strategy developed achieve global incorporation butylammonium cations at both bulk grain boundaries by post-treating films with mixture N,N-dimethylformamide n-butylammonium iodide isopropanol solvent, enabling strain-free simultaneously reduced defect density, suppressed ion migration, improved energy level alignment. As result, corresponding single-junction yield champion PCE 21.8%, while maintaining 100% 81% their initial PCEs without encapsulation after storage for over 2500 h N2 1800 air, respectively. Remarkably, certified stabilized 29.0% monolithic tandems based on tunnel oxide passivated contacts further demonstrated. The unencapsulated device retains 86.6% its performance 306 maximum point (MPP) tracking under continuous xenon-lamp illumination filtering ultraviolet light (in 20-35 °C, 25-75%RH, most often ≈60%RH).

Язык: Английский

---

Stabilizing Top Interface by Molecular Locking Strategy with Polydentate Chelating Biomaterials toward Efficient and Stable Perovskite Solar Cells in Ambient Air

Advanced Materials, Год журнала: 2024, Номер 36(19)

Опубликована: Фев. 1, 2024

The instability of top interface induced by interfacial defects and residual tensile strain hinders the realization long-term stable n-i-p regular perovskite solar cells (PSCs). Herein, one molecular locking strategy is reported to stabilize adopting polydentate ligand green biomaterial 2-deoxy-2,2-difluoro-d-erythro-pentafuranous-1-ulose-3,5-dibenzoate (DDPUD) manipulate surface grain boundaries films. Both experimental theoretical evidence collectively uncover that uncoordinated Pb

Язык: Английский

---