A5033061744- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Organic Light-Emitting Diodes Research
- 2D Materials and Applications
- Organic Electronics and Photovoltaics
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Luminescence Properties of Advanced Materials
- Ga2O3 and related materials
- Carbohydrate Chemistry and Synthesis
- Covalent Organic Framework Applications
- Optical properties and cooling technologies in crystalline materials
- Organic and Molecular Conductors Research
- Proteoglycans and glycosaminoglycans research
- Glycosylation and Glycoproteins Research
- ZnO doping and properties
- Electron and X-Ray Spectroscopy Techniques
- Porphyrin and Phthalocyanine Chemistry
- Enzyme Production and Characterization
- Synthesis and Characterization of Heterocyclic Compounds
Wuhan University
2014-2025
Ministry of Education of the People's Republic of China
2025
Shenzhen University
2013-2024
Northwestern University
2016-2022
Center for Light Energy Activated Redox Processes
2019
University of Toledo
2015-2017
National Renewable Energy Laboratory
2016
Institute for Biological Sciences
2003-2005
University of Manchester
1983-1984
Institute of Science and Technology
1983
Lead halide perovskite solar cells with the high efficiencies typically use high-temperature processed TiO2 as electron transporting layers (ETLs). Here, we demonstrate that low-temperature solution-processed nanocrystalline SnO2 can be an excellent alternative ETL material for efficient cells. Our best-performing planar cell using such a has achieved average efficiency of 16.02%, obtained from measured both reverse and forward voltage scans. The outstanding performance ETLs is attributed to...
Abstract Since the 2012 breakthroughs 1–3 , it is now very much accepted that halide perovskite solar cells may have a strong practical impact in next-generation cells. The most efficient are using Pb-based perovskites. presence of Pb these devices, however, has caused some concerns due to high perceived toxicity Pb, which slow down or even hinder pace commercialization. Therefore, science community been searching for lower-toxicity perovskite-type materials as back-up strategy. paying...
The three-dimensional hybrid organic-inorganic perovskites have shown huge potential for use in solar cells and other optoelectronic devices. Although these materials are under intense investigation, derivative with lower dimensionality emerging, offering higher tunability of physical properties new capabilities. Here, we present two series two-dimensional (2D) that adopt the Dion-Jacobson (DJ) structure type, which first complete homologous reported halide perovskite chemistry. Lead iodide...
Thin-film photovoltaics based on organic–inorganic hybrid perovskite light absorbers have recently emerged as a promising low-cost solar energy harvesting technology.
Lead thiocyanate in the perovskite precursor can increase grain size of a thin film and reduce conductivity boundaries, leading to solar cells with reduced hysteresis enhanced fill factor. A planar cell boundary interface passivation achieves steady-state efficiency 18.42%.
Efficient lead halide perovskite solar cells use hole-blocking layers to help collection of photogenerated electrons and achieve high open-circuit voltages. Here, we report the realization efficient grown directly on fluorine-doped tin oxide-coated substrates without using any layers. With ultraviolet–ozone treatment substrates, a planar Au/hole-transporting material/CH3NH3PbI3-xClx/substrate cell processed by solution method has achieved power conversion efficiency over 14% an voltage 1.06...
Abstract The carrier concentration of the electron‐selective layer (ESL) and hole‐selective can significantly affect performance organic–inorganic lead halide perovskite solar cells (PSCs). Herein, a facile yet effective two‐step method, i.e., room‐temperature colloidal synthesis low‐temperature removal additive (thiourea), to control SnO 2 quantum dot (QD) ESLs achieve high‐performance PSCs is developed. By optimizing electron density QD ESLs, champion stabilized power output 20.32% for...
High-performance and good-stability hollow Sn-based perovskite solar cells using ethylenediammonium formamidinium cations.
A perovskite solar cell with a thin TiO2 compact film prepared by thermal oxidation of sputtered Ti achieved high efficiency 15.07%. The is very dense and inhibits the recombination process at interface. optimum thickness thinner than that spin-coating method. Also, porous can be sintered same time. This one-step sintering leads to lower dark current density, series resistance, higher resistance those two-step sintering. Therefore, has short-circuit density fill factor.
Two-dimensional (2D) halide perovskites have extraordinary optoelectronic properties and structural tunability. Among them, the Dion-Jacobson phases with inorganic layers stacking exactly on top of each other are less explored. Herein, we present new series 2D perovskites, which adopt general formula A'An-1PbnI3n+1 (A' = 4-(aminomethyl)pyridinium (4AMPY), A methylammonium (MA), n 1-4). By modifying position CH2NH3+ group from 4AMPY to 3AMPY (3AMPY 3-(aminomethyl)pyridinium), changes eclipsed...
Abstract All-inorganic perovskites have a special place in halide perovskite family because of their potential for better stability. However, the representative cesium lead iodide (CsPbI 3 ) is metastable and spontaneously converts to non-perovskite structure at room temperature. Here, we demonstrate that what appears be all-inorganic CsPbI stabilized its form using purported intermediate known as hydrogen (HPbI is, fact, hybrid dimethylammonium (Cs 1− x DMA PbI , = 0.2 0.5). Thus, many...
Tin-based perovskites have very comparable electronic properties to lead-based and are regarded as possible lower toxicity alternates for solar cell applications. However, the efficiency of tin-based perovskite cells is still low they exhibit poor air stability. Here, we report lead-free with greatly enhanced performance stability using so-called "hollow" ethylenediammonium methylammonium tin iodide ({en}MASnI3) absorbers. Our results show that en can improve film morphology most importantly...
Abstract Low ionic migration is required for a semiconductor material to realize stable high‐performance X‐ray detection. In this work, successful controlled incorporation of not only methylammonium (MA + ) and cesium (Cs cations, but also bromine (Br – anions into the FAPbI 3 lattice grow inch‐sized perovskite single crystal (FAMACs SC) reported. The smaller cations anions, comparing original FA I help release stress so that FAMACs SC shows lower ion migration, enhanced hardness, trap...
Abstract Hybrid halide 2D perovskites deserve special attention because they exhibit superior environmental stability compared with their 3D analogs. The closer interlayer distance discovered in Dion–Jacobson (DJ) type of relative to Ruddlesden–Popper (RP) implies better carrier charge transport and performance solar cells. Here, the structure properties DJ employing 3‐(aminomethyl)piperidinium (3AMP 2+ ) as spacing cation a mixture methylammonium (MA + formamidinium (FA cations perovskite...
The unique hybrid nature of 2D Ruddlesden-Popper (R-P) perovskites has bestowed upon them not only tunability their electronic properties but also high-performance devices with improved environmental stability as compared to 3D analogs. However, there is limited information about inherent heat, light, and air how different parameters such the inorganic layer number length organic spacer molecule affect stability. To gain deeper understanding on matter we have expanded family R-P perovskites,...
Achieving high open-circuit voltage (Voc) for tin-based perovskite solar cells is challenging. Here, we demonstrate that a ZnS interfacial layer can improve the Voc and photovoltaic performance of formamidinium tin iodide (FASnI3) cells. The TiO2-ZnS electron transporting (ETL) with cascade conduction band structure effectively reduce charge recombination facilitate transfer. Our best-performing FASnI3 cell using cascaded ETL has achieved power conversion efficiency 5.27%, higher 0.380 V,...
Low-dimensional halide perovskites have recently attracted intense interest as alternatives to the three-dimensional (3D) because of their greater tunability and higher environmental stability. Herein, we present new homologous 2D series (NH3CmH2mNH3)(CH3NH3)n−1PbnI3n+1 (m = 4–9; n 1–4), where m represents carbon-chain number equals layer-thickness number. Multilayer (n > 1) incorporating diammonium cations were successfully synthesized by solid-state grinding method for 4 6 solution 7–9....
Fullerene passivated tin oxide electron selective layers enhance the performance of planar perovskite solar cells.
The two-dimensional (2D) perovskites stabilized by alternating cations in the interlayer space (ACI) define a new type of structure with different physical properties than more common Ruddlesden–Popper counterparts. However, there is lack understanding material crystallization films and its influence on morphological/optoelectronic final photovoltaic devices. Herein, we undertake situ studies solidification process for ACI 2D perovskite (GA)(MA)nPbnI3n+1 (⟨n⟩ = 3) from ink to solid-state...
The origin of the performance difference perovskite solar cells using different temperature processed tin oxide electron selective layers.
Despite the rapid increase of efficiency, perovskite solar cells (PSCs) still face some challenges, one which is current-voltage hysteresis. Herein, it reported that yttrium-doped tin dioxide (Y-SnO2 ) electron selective layer (ESL) synthesized by an in situ hydrothermal growth process at 95 °C can significantly reduce hysteresis and improve performance PSCs. Comparison studies reveal two main effects Y doping SnO2 ESLs: (1) promotes formation well-aligned more homogeneous distribution...
In this letter, we report perovskite solar cells with thin dense Mg-doped TiO2 as hole-blocking layers (HBLs), which outperform using HBLs in several ways: higher open-circuit voltage (Voc) (1.08 V), power conversion efficiency (12.28%), short-circuit current, and fill factor. These properties improvements are attributed to the better of Mg-modulated compared such optical transmission properties, upshifted conduction band minimum (CBM) downshifted valence maximum (VBM), effect, electron life...