Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 446, P. 137349 - 137349
Published: June 2, 2022
Language: Английский
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(24)
Published: March 26, 2024
Abstract Ion migration‐induced intrinsic instability and large‐area fabrication pose a tough challenge for the commercial deployment of perovskite photovoltaics. Herein, an interface heterojunction metal electrode stabilization strategy is developed by suppressing ion migration via managing lead‐based imperfections. After screening series cations nonhalide anions, ideal organic salt molecule dimethylammonium trifluoroacetate (DMATFA) consisting (DMA + ) cation (TFA − anion selected to manipulate surface films. DMA enables conversion active excess and/or unreacted PbI 2 into stable new phase DMAPbI 3 , inhibiting photodecomposition migration. Meanwhile, TFA can suppress iodide through passivating undercoordinated Pb 2+ vacancies. synergistically stabilize silver electrode. The DMATFA‐treated inverted solar cells modules achieve maximum efficiency 25.03% (certified 24.65%, 0.1 cm 20.58% (63.74 ), respectively, which record ever reported devices based on vacuum flash evaporation technology. DMATFA modification results in outstanding operational stability, as evidenced maintaining 91% its original after 1520 h power point continuous tracking.
Language: Английский
Citations
37
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(13)
Published: Jan. 10, 2024
Abstract In the domain of perovskite photovoltaics, heterointerfaces are subject to substantial trap‐assisted non‐radiative recombination, predominantly attributed energy offset, interface defects, and roughness contact. This phenomenon at heterointerfaces, where carrier recombination dissipation occur due defects suboptimal level alignment, can be principally held accountable for V oc losses. Herein, a heterointerface energetics regulation (HER) strategy is proposed by introducing potassium trifluoroacetate (KTFA) in precursor solution eliminate trap optimize surface potential Fermi level. It first demonstrated that non‐doping K + but precipitating upper buried will improve energy‐level alignment charge extraction dynamics. addition, TFA − exhibits strong electrostatic force with undercoordinated Pb 2+ contact Sn 4+ SnO 2 electron transporting layer. Based on vacuum flash evaporation green treatment without anti‐solvent, Rb 0.02 (Cs 0.05 FA 0.95 ) 0.98 PbI 0.91 Br 0.03 Cl 0.06 Cs 3 based device achieve maximum efficiency 23.36% 24.48%, respectively. Further, modified devices exhibit 92% initial output after 1200 h aging. HER addressing bandgap poised advance both performance stability solar cells.
Language: Английский
Citations
25
Nano Research, Journal Year: 2022, Volume and Issue: 15(6), P. 5114 - 5122
Published: March 10, 2022
Language: Английский
Citations
60
Journal of Energy Chemistry, Journal Year: 2022, Volume and Issue: 76, P. 277 - 287
Published: Sept. 29, 2022
Language: Английский
Citations
43
Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(21)
Published: April 14, 2023
Abstract Hybrid chemical vapor deposition (HCVD) is a promising method for the up‐scalable fabrication of perovskite solar cells/modules (PSCs/PSMs). However, efficiency HCVD‐based cells still lags behind solution‐processed PSCs/PSMs. In this work, oxygen loss electron transport layer SnO 2 in HCVD process and its negative impact on cell device performance are revealed. As counter‐measure, potassium sulfamate (H KNO 3 S) introduced as passivation to both mitigate issue passivate uncoordinated Pb 2+ film. parallel, N‐ methylpyrrolidone (NMP) used solvent dissolve PbI by forming intermediate phase •NMP, which can greatly lower energy barrier nucleation process. The seed employed further modulate kinetics crystal growth improve grain size. resultant yield champion power conversion (PCE) 21.98% (0.09 cm ) with stable output 21.15%, PCEs mini‐modules 16.16% (22.4 , 14.72%) 12.12% (91.8 ). Furthermore, unencapsulated small area shows an outstanding operational stability T 80 lifetime exceeding 4000 h.
Language: Английский
Citations
40
Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(25)
Published: March 20, 2023
Abstract Despite the rapid developments are achieved for perovskite solar cells (PSCs), existence of various defects in devices still limits further enhancement power conversion efficiency (PCE) and long‐term stability devices. Herein, efficient organic potassium salt (OPS) para‐halogenated phenyl trifluoroborates is presented as precursor additives to improve performance PSCs. Studies have shown that 4‐chlorophenyltrifluoroborate (4‐ClPTFBK) exhibits most effective interaction with lattice. Strong coordination between BF 3 − /halogen anion uncoordinated Pb 2+ /halide vacancies, along hydrogen bond F H FA + observed. Thus, due synergistic contribution anionic groups, high‐quality film large grain size low defect density achieved. As a result, optimal show an enhanced 24.50%, much higher than control device (22.63%). Furthermore, unencapsulated present remarkable thermal stability, maintaining 86% initial PCE after test at 80 °C 1000 h 95% storage air 2460 h.
Language: Английский
Citations
33
Nano Energy, Journal Year: 2023, Volume and Issue: 109, P. 108241 - 108241
Published: Jan. 29, 2023
Language: Английский
Citations
26
Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(16), P. 8573 - 8598
Published: Jan. 1, 2023
In this review, the morphology, composition and microstructure of buried interface are discussed, effective passivation strategies corresponding mechanisms summarized systematically.
Language: Английский
Citations
26
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(24)
Published: April 15, 2023
Possessed with advantageous optoelectronic properties, perovskites have boosted the rapid development of solution-processed solar cells. The performance perovskite cells (PSCs) is significantly weakened by carrier loss at grain boundary grooves (GBGs); however, it receives limited attention and there lacks effective approach to solve this issue. Herein, for first time, we constructed tungstate/perovskite heterointerface via a "two step" in situ reaction that provides defect passivation ensures efficient dynamics GBGs. exposed boundaries converted wide-band-gap PbWO4 an in-situ between Pb2+ tungstate ions, which passivate defects due strong ionic bonding. Moreover, recombination further suppressed energetics modification based on additional transformation from CaWO4 . PSCs groove strategy showed good universality both normal inverted structure, improved efficiency 23.25 % n-i-p device 23.33 p-i-n device. Stable power output modified could maintain 91.7 after around 1100 h, retain 92.5 aging air 2110 93.1 85 °C N2 972 h.
Language: Английский
Citations
24
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(22)
Published: Feb. 5, 2024
Abstract Well‐engineered buried interfaces play a pivotal role in achieving high‐performance perovskite solar cells (PSCs). A superior interface involves controlled crystallization, efficient charge transfer across interfaces, and robust interfacial bonding. Here, class of innovative additives, benzoyl sulfonyl molecules including 4‐sulfobenzoic acid monopotassium salt (K‐SBA), 4‐sulfamoylbenzoic (SBA) is introduced to tailer the SnO 2 /perovskite interface, aiming meet these essential criteria. Among them, K‐SBA performed better. The findings reveal that functional groups establish interactions with both perovskite, leading effective bilateral passivation mitigation stress. This results formation pore‐free high‐quality films substantial crystal sizes. Consequently, PSCs incorporating exhibited notable increase efficiency, 24.56% efficiency compared control device's 22.27%. Furthermore, K‐SBA‐enhanced maintain 90% their original even after 500 h maximum power point tracking. work provides valuable insights for further refinement advancement PSCs.
Language: Английский
Citations
16