Journal of Energy Chemistry, Journal Year: 2022, Volume and Issue: 76, P. 277 - 287
Published: Sept. 29, 2022
Language: Английский
Advanced Materials, Journal Year: 2022, Volume and Issue: 34(24)
Published: April 18, 2022
Flexible perovskite solar cells (f-PSCs) have attracted great attention because of their unique advantages in lightweight and portable electronics applications. However, efficiencies are far inferior to those rigid counterparts. Herein, a novel histamine diiodate (HADI) is designed based on theoretical study modify the SnO2 /perovskite interface. Systematic experimental results reveal that HADI serves effectively as multifunctional agent mainly three aspects: 1) surface modification realign conduction band upward improve interfacial charge extraction; 2) passivating buried surface, 3) bridging between layers for effective transfer. Consequently, MA-free PSCs HADI-SnO2 electron transport layer (ETL) display not only high champion power conversion efficiency (PCE) 24.79% open-circuit voltage (VOC ) 1.20 V but also outstanding stability demonstrated by preserving 91% initial after being exposed ambient atmosphere 1200 h without any encapsulation. Furthermore, solution-processed ETL formed at low temperature (100 °C) utilized f-PSCs achieve PCE 22.44%, highest reported date.
Language: Английский
Citations
313
Advanced Materials, Journal Year: 2022, Volume and Issue: 34(21)
Published: April 5, 2022
Halide perovskites have shown superior potentials in flexible photovoltaics due to their soft and high power-to-weight nature. However, interfacial residual stress lattice mismatch the large deformation of substrates greatly limited performance perovskite solar cells (F-PSCs). Here, ammonium formate (HCOONH4 ) is used as a pre-buried additive electron transport layer (ETL) realize bottom-up infiltration process for an situ, integral modification ETL, layer, interface. The HCOONH4 treatment leads enhanced extraction relaxed strain micro-strain film, along with reduced defect densities within these layers. As result, top power conversion efficiency 22.37% certified 21.9% on F-PSCs are achieved, representing highest reported so far. This work links critical connection between multilayer mechanics/defect profiles ETL-perovskite structure device performance, thus providing meaningful scientific direction further narrowing gap rigid-substrate counterparts.
Language: Английский
Citations
216
Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)
Published: July 10, 2023
Nowadays, the soar of photovoltaic performance perovskite solar cells has set off a fever in study metal halide materials. The excellent optoelectronic properties and defect tolerance feature allow to be employed wide variety applications. This article provides holistic review over current progress future prospects materials representative promising applications, including traditional devices (solar cells, light-emitting diodes, photodetectors, lasers), cutting-edge technologies terms neuromorphic (artificial synapses memristors) pressure-induced emission. highlights fundamentals, remaining challenges for each application, aiming provide comprehensive overview development status navigation research devices.
Language: Английский
Citations
201
Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(9), P. 3825 - 3836
Published: Jan. 1, 2023
Synergistic modification of new intermediate phase assisted crystallization and upper interface passivation for enhanced crystallization, reduced defect density, released stress in perovskite films, enabling 24.61% efficient inverted devices.
Language: Английский
Citations
120
Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 15(1)
Published: Dec. 29, 2022
The interfacial defects and energy barrier are main reasons for nonradiative recombination. In addition, poor perovskite crystallization incomplete conversion of PbI2 to restrict further enhancement the photovoltaic performance devices using sequential deposition. Herein, a buried interface stabilization strategy that relies on synergy fluorine (F) sulfonyl (S=O) functional groups is proposed. A series potassium salts containing halide non-halogen anions employed modify SnO2/perovskite interface. Multiple chemical bonds including hydrogen bond, coordination bond ionic realized, which strengthens contact defect passivation effect. interaction between modification molecules along with SnO2 heightens incessantly as number S=O F augments. strength modifiers well gradually increases increase in F. effect positively correlated strength. kinetics regulated through compromise wettability substrates. Compared Cl-, all perform better optimization, band regulation passivation. device bis (fluorosulfonyl) imide achieves tempting efficiency 24.17%.
Language: Английский
Citations
111
Advanced Materials, Journal Year: 2022, Volume and Issue: 34(16)
Published: March 14, 2022
Manipulating the perovskite solidification process, including nucleation and crystal growth, plays a critical role in controlling film morphology thus affects resultant device performance. In this work, facile effective ethyl alcohol (EtOH) cosolvent strategy is demonstrated with incorporation of EtOH into ink for high-performance room-temperature blade-coated solar cells (PSCs) modules. Systematic real-time crystallization studies uncover delicate structural evolutions phase-transition pathway. Time-resolved X-ray diffraction density functional theory calculations both demonstrate that mixed-solvent system significantly promotes formation an FA-based precursor solvate (FA2 PbBr4 ·DMSO) during trace-solvent-assisted transition which finely regulates balance between growth to guarantee high-quality films. This efficiently suppresses nonradiative recombination improves efficiencies 1.54 (23.19%) 1.60 eV (22.51%) systems, represents one highest records PSCs small-area devices minimodules. An excellent VOC deficit as low 335 mV system, coincident measured loss only 77 mV, achieved. More importantly, enhanced stability another signature approach.
Language: Английский
Citations
106
Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(14)
Published: Feb. 20, 2022
Abstract The existence of a defective area composed nanocrystals and amorphous phases on perovskite film inevitably causes nonradiative charge recombination structural degradation in photovoltaics. In this study, stoichiometric etching strategy for the top surface cesium lead halide is developed by using ionic liquids. dissolution original substantially exposes underlying perovskite, which high‐quality with retained stoichiometry lattice continuity. liquid molecules are adsorbed via Coulombic interactions passivate undercoordinated centers. Such modulation considerably reduces trap density devices enables record power conversion efficiency 17.51% an open‐circuit voltage 1.37 V CsPbI 2 Br cell bandgap 1.88 eV. This work provides novel technical route to improve environmental resilience perovskite‐based optoelectronic devices.
Language: Английский
Citations
89
Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(19)
Published: March 28, 2022
Abstract External encapsulation technique as a straightforward craft process has been adopted to prevent the infiltration of moisture and oxygen, thereby improving environmental stabilities lead halide perovskite solar cells (PSCs). However, irreversible light‐induced degradation originating from various vacancies ion diffusion or migration inside device cannot be efficiently solved by external encapsulation. Herein, an internal strategy introducing NbCl 5 at buried tin oxide/perovskite interface spin‐casting n ‐butylammonium bromide on top is developed comprehensively passivate hence block channels for migration. The results in better homogeneous electron transport layer effective vacancy passivation simultaneously generates more homogeneous, crystallized vertical direction with significantly reduced residual PbI 2 . Furthermore, fewer oxygen formation ultrathin Nb O interfacial energy level alignment transfer. As result, power conversion efficiency (PCE) resulting PSCs high 24.01%. More importantly, demonstrates excellent stability, retaining 88% its initial PCE maximum point tracking measurement (under 100 mW cm –2 white light illumination ≈55 °C temperature, N atmosphere) after 1000 h.
Language: Английский
Citations
89
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
Citations
84
Joule, Journal Year: 2022, Volume and Issue: 6(12), P. 2869 - 2884
Published: Oct. 24, 2022
Language: Английский
Citations
80