A5062037254- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Luminescence Properties of Advanced Materials
- 2D Materials and Applications
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
- Layered Double Hydroxides Synthesis and Applications
- Organic Electronics and Photovoltaics
- Advancements in Solid Oxide Fuel Cells
- Radiation Detection and Scintillator Technologies
- Thermal Expansion and Ionic Conductivity
- Organic and Molecular Conductors Research
- Optical properties and cooling technologies in crystalline materials
Shaanxi Normal University
2020-2025
Ministry of Education of the People's Republic of China
2022-2023
Advanced Energy Materials (United States)
2023
Even though the perovskite solar cell has been so popular for its skyrocketing power conversion efficiency, further development is still roadblocked by overall performance, in particular long-term stability, large-area fabrication and stable module efficiency. In essence, soft component ionic-electronic nature of metal halide perovskites usually chaperonage large number anion vacancy defects that act as recombination centers to decrease both photovoltaic efficiency operational stability....
Understanding and controlling crystallization is crucial for high-quality perovskite films efficient solar cells. Herein, the issue of defects in formamidinium lead iodide (FAPbI3 ) formation addressed, focusing on role intermediates. A comprehensive picture structural carrier evolution during demonstrated using situ grazing-incidence wide-angle X-ray scattering, ultraviolet-visible spectroscopy photoluminescence spectroscopy. Three stages are identified: precursors to δ-FAPbI3 intermediate,...
A robust perovskite-buried interface is pivotal for achieving high-performance flexible indoor photovoltaics as it significantly influences charge transport and extraction efficiency. Herein, a molecular bridge strategy introduced utilizing sodium 2-cyanoacetate (SZC) additive at the to simultaneously achieve in situ passivation of interfacial defects bottom-up crystallization modulation, resulting photovoltaic applications. Supported by both theoretical calculations experimental evidences,...
The efficiency of metal halide perovskite solar cells (PSCs) has skyrocketed; however, defects created by aging precursor solutions and during crystallization pose a significant barrier to the reproducibility cells. In this work, fluoro-N,N,N″,N″-tetramethylformamidinium hexafluorophosphate (F-(CH3 )4 CN2 PF6 , abbreviated as TFFH) is introduced stabilize solution improve dynamics simultaneously for high-performance formamidinium lead iodide (FAPbI3 )-based indoor photovoltaics. TFFH...
Abstract Dion–Jacobson (DJ) 2D hybrid perovskite semiconductors offer improved environmental stability and higher structural diversity in comparison with their 3D analogous. However, lacking of controlled crystallization makes it a challenge to achieve high charge transport for photovoltaic devices. Here, detailed understanding effects on film formation during different solution‐casting processes the DJ (PDMA)(MA) n −1 Pb I 3 +1 (< > = 4, PDMA refers 1,4‐phenylenedimethanammonium)...
Manipulating the formation process of 2D/3D perovskite heterostructure, including its nucleation/growth dynamics and phase transition pathway, plays a critical role in controlling charge transport between 2D 3D crystals, consequently, scalable fabrication efficient stable solar cells. Herein, structural evolution pathways ligand-dependent atop surface are revealed using time-resolved X-ray scattering. The results show that ligand size shape have influence on final structure. In particular,...
Metal-halide perovskitoids with corner-, edge-, and face-sharing octahedra provide a fertile "playground" for structure modulation. With low defect density, ion migration, high intrinsic stability, two-dimensional (2D) perovskitoid single crystals are expected to be ideal materials room-temperature semiconductor detectors (RTSDs) as high-energy radiation. However, there is no report yet on the use of 2D X-ray detection, well how halide-modulated molecular assembly would affect their...
Photovoltaic technology with low weight, high specific power in cold environments, and compatibility flexible fabrication is highly desired for near-space vehicles polar region applications. Herein, we demonstrate efficient low-temperature perovskite solar cells by improving the interfacial contact between electron-transport layer (ETL) layer. We find that adsorbed oxygen active sites vacancies of tin oxide (SnO2 ) ETL can be effectively decreased incorporating a trace amount titanium...
In the two-step procedure for preparing a perovskite film, chemistry of PbI2 solution plays an important role in determining phase stability films. We report here sulfoxonium salt-controlled crystallization stabilizing α-phase formamidinium lead iodide (FAPbI3) solar cells via additive engineering solution. The situ grazing incidence wide-angle X-ray scattering studies reveal that trimethylsulfoxonium (TMSOI) leads to ordered solvated quasi-crystalline PbI2, which facilitates transformation...
Perovskite photovoltaics have emerged as the most promising candidates for next-generation light-to-electricity technology. However, their practical application still suffers from energy loss induced by intrinsic defects within perovskite lattice. Here, a refined defect passivation in films is designed, which shows multi-interaction mechanism between and passivator. Interestingly, shift of molecular bonding observed upon cooling down film, leading to stronger iodine/formamidine vacancies....
Abstract The perovskite/silicon tandem solar cell (TSC) has attracted tremendous attention due to its potential breakthrough the theoretical efficiency set for single‐junction cells. However, perovskite (PSC) designed as top component suffers from severe photo‐induced halide segregation owing mixed‐halide strategy achieving desirable wide‐bandgap (1.68 eV). Developing pure‐iodide perovskites is a promising route fabricate photostable TSCs. Here, we report efficient and PSCs made an...
Flexible perovskite solar cells (F-PSCs) are emerging as a promising solution for weight-sensitive, wearable, portable, and flexible applications. However, F-PSCs still suffer from poor mechanical reliability due to weak interlayer...
Two‐dimensional alternating cation (ACI)‐type perovskites self‐assemble in solution to form highly ordered periodic stacks with unique physical properties and improved optoelectronic devices. Tailoring composition distribution of quantum wells (QWs) is vital importance for the stability, which, however, have been less reported contrast their Ruddlesden–Popper (RP) Dion–Jacobson (DJ) counterparts. Herein, crystallization control via solvent engineering ACI perovskite (GA)MA n Pb I 3 +1 (<...
X-ray detectors have broad applications in medicine and industry. Although flexible lead-free perovskite films are competitive because of their lightweight low toxicity, they less efficient due to charge transport. Herein, we report low-toxicity, based on p-type doped MA3 Bi2 I9 (MA=methylammonium) perovskite-filled membranes (PFMs). Strong coordination between dopant 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) the establishment charge-transfer complex (CPX) improved...
We demonstrate an inclusive study on the growth, properties and application in solar cells of FA-based Ruddlesden–Popper type perovskites M 2 FA n −1 Pb I 3 +1 (M = benzylamine (PMA) or FA) fabricated via two-step sequential deposition.
Upscalable printing of high-performance and stable perovskite solar cells (PSCs) is highly desired for commercialization. However, the efficiencies printed PSCs lag behind those their lab-scale spin-coated counterparts owing to lack systematic understanding control over crystallization dynamics. Here, controlled dynamics achieved using an additive 1-butylpyridine tetrafluoroborate (BPyBF4 ) high-quality ambient α-formamidinium lead triiodide (FAPbI3 films are reported. Using in situ...
Self-driven X-ray detectors, which eliminate the need for an external power supply and offer portability, are gaining significant attention medical industrial applications. However, their use is limited in emerging wearable electronics imaging non-flat or complex objects. Here, we address this issue by developing a heterogeneous integration strategy on scalable production scale to create flexible, large-scale, thick perovskite membranes with high-performance, self-driven detection...
Flexible perovskite solar cells (F-PSCs) have the advantages of high power-per-weight, solution processability, and bending durability emerged as a competitive photovoltaic technology for various applications. As core electron transport layer (ETL) in n-i-p-type device configurations, solution-processed SnO2 generally suffers from serious defect stacking on films, compromising charge properties performance resulting devices. Herein, we proposed media-filling strategy to optimize contact...
Perovskite solar cells (PSCs) can utilize the residual photons from indoor light and continuously supplement energy supply for low-power electron devices, thereby showing great potential sustainable ecosystems. However, solution-processed perovskites suffer serious defect stacking within crystal lattices, compromising low-light efficiency operational stability. In this study, we designed a multifunctional organometallic salt named sodium sulfanilate (4-ABS), containing both electron-donating...
High-quality methylammonium lead iodide-based perovskite layer with large crystal grains and relaxed lattice strain is demonstrated <italic>via</italic> simple ambient blade-coating from green solvents, an efficiency of 20.21% in solar cells.
New structural type of 2D AA'n-1 Mn X3n+1 halide perovskites stabilized by symmetric diammonium cations has attracted research attention recently due to the short interlayer distance and better charge-transport for high-performance solar cells (PSCs). However, distribution control quantum wells (QWs) its influence on optoelectronic properties are largely underexplored. Here effective phase-alignment is reported through dynamical film formation improve charge transfer between perovskite...
Abstract High‐sensitivity wearable radiation detectors are essential for personnel protection in environments such as defense, nuclear facilities, and medical fields. Traditional using bulk crystals lack flexibility, emerging perovskite films suffer from lead toxicity poor charge transport. Herein, lead‐free photoferroelectric hybrid metal halide flexible membranes presented, offering superior X‐ray response with sensitivities up to 7872 ± 517 µC Gy air −1 cm −2 at 50 V bias 394 67 a...