Elimination of unstable residual lead iodide near the buried interface for the stability improvement of perovskite solar cells

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(5), P. 2295 - 2303

Published: Jan. 1, 2023

A pre-embedding mixed A-cation halide strategy is developed to eliminate the residual unstable PbI 2 and lattice strain near buried interface of perovskite layer for stability improvement formamidinium-based solar cells.

Language: Английский

---

Multifunctional Small Molecule as Buried Interface Passivator for Efficient Planar Perovskite Solar Cells

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

Published: March 2, 2023

Abstract The improvement of power conversion efficiency (PCE) and stability the perovskite solar cell (PSC) is hindered by carrier recombination originating from defects at buried interface PSC. It crucial to suppress nonradiative facilitate transfer in PSC via engineering. Herein, P‐biguanylbenzoic acid hydrochloride (PBGH) developed modify tin oxide (SnO 2 )/perovskite interface. effects PBGH on transportation, growth, defect passivation, performance are systematically investigated. On one hand, can effectively passivate trap states Sn dangling bonds O vacancies SnO surface Lewis acid/base coordination, which conducive improving conductivity film accelerating electron extraction. other modification assists formation high‐quality with low density due its strong interaction PbI . Consequently, PBGH‐modified exhibits a champion 24.79%, highest PCEs among all FACsPbI 3 ‐based PSCs reported date. In addition, stabilities films devices under high temperature/humidity light illumination conditions also studied.

Language: Английский

---

Omnidirectional diffusion of organic amine salts assisted by ordered arrays in porous lead iodide for two-step deposited large-area perovskite solar cells

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(2), P. 629 - 640

Published: Jan. 1, 2023

The porous lead iodide layer with ordered arrays structure is firstly fabricated to facilitate the omnidirectional diffusion of organic amine salts and realize high quality large-area perovskite film in two-step sequential deposition.

Language: Английский

---

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

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(52)

Published: April 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

Language: Английский

---

Intermediate Phase Engineering with 2,2‐Azodi(2‐Methylbutyronitrile) for Efficient and Stable Perovskite Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(23)

Published: March 24, 2023

Sequential deposition has been widely employed to modulate the crystallization of perovskite solar cells because it can avoid formation nucleation centers and even initial in precursor solution. However, challenges remain overcoming incomplete random transformation PbI2 films with organic ammonium salts. Herein, a unique intermediate phase engineering strategy developed by simultaneously introducing 2,2-azodi(2-methylbutyronitrile) (AMBN) both salt solutions regulate crystallization. AMBN not only coordinates form favorably mesoporous film due coordination between Pb2+ cyano group (C≡N), but also suppresses vigorous activity FA+ ions interacting FAI, leading full preferred orientation. Therefore, perovskites favorable facet orientations are obtained, defects largely suppressed owing passivation uncoordinated . As result, champion power conversion efficiency over 25% stabilized 24.8% is achieved. Moreover, device exhibits an improved operational stability, retaining 96% under 1000 h continuous white-light illumination intensity 100 mW cm-2 at ≈55 °C N2 atmosphere.

Language: Английский

---

Thermally Crosslinked F‐rich Polymer to Inhibit Lead Leakage for Sustainable Perovskite Solar Cells and Modules

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(31)

Published: June 8, 2023

High-performance perovskite solar cells have demonstrated commercial viability, but still face the risk of contamination from lead leakage and long-term stability problems caused by defects. Here, an organic small molecule (octafluoro-1,6-hexanediol diacrylate) is introduced into film to form a polymer through in situ thermal crosslinking, which carbonyl group anchors uncoordinated Pb2+ reduces lead, along with -CF2 - hydrophobic protecting water invasion. Additionally, passivates varieties Pb-related I-related defects coordination hydrogen bonding interactions, regulating crystallization reduced trap density, releasing lattice strain, promoting carrier transport extraction. The optimal efficiencies polymer-incorporated devices are 24.76 % (0.09 cm2 ) 20.66 (14 ). More importantly, storage stability, operational been significantly improved.

Language: Английский

---

Encapsulation: The path to commercialization of stable perovskite solar cells

Matter, Journal Year: 2023, Volume and Issue: 6(11), P. 3838 - 3863

Published: Sept. 15, 2023

Language: Английский

---

Oriented Molecular Bridge Constructs Homogeneous Buried Interface for Perovskite Solar Cells with Efficiency Over 25.3%

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(16)

Published: Feb. 7, 2024

Abstract Buried interface optimization matters the efficiency improvement of planar perovskite solar cells (PSCs), and molecular bridge is reported to be an effective approach. Herein, a constructed at buried using 4‐chloro‐3‐sulfamoylbenzoic acid (CSBA), its preferred arrangement systematically investigated. It elucidated that CSBA prone orientationally absorbed on TiO 2 surface through COOH–Ti, then connect with S═O–Pb, resulting in feasible oriented bridge. Contributing passivated interfacial defects, optimized energy level, released tensile stress, from bridge, PSCs active area 0.08 cm achieve certified power conversion (PCE) 25.32%, highest among ‐based PSCs. Encouragingly, 1 champion PCE 24.20%, significantly promoting progress large‐area In addition, possess enhanced stability, unencapsulated can maintain ≈91% ≈85% their initial after 3000 h aging under ambient condition 1200 exposure UV irradiation.

Language: Английский

---

Covalent bonding strategy to enable non-volatile organic cation perovskite for highly stable and efficient solar cells

Joule, Journal Year: 2023, Volume and Issue: 7(5), P. 1033 - 1050

Published: April 20, 2023

Language: Английский

---

The impact of moisture on the stability and degradation of perovskites in solar cells

Materials Advances, Journal Year: 2024, Volume and Issue: 5(6), P. 2200 - 2217

Published: Jan. 1, 2024

Efficiency and stability are the two most important factors in commercially scalable solar cells.

Language: Английский

---