A5027824016- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Advanced battery technologies research
- Advanced biosensing and bioanalysis techniques
- CCD and CMOS Imaging Sensors
- Nanopore and Nanochannel Transport Studies
Wuhan University
2022-2025
Ningbo University
2020-2022
Flexible perovskite solar cells (F-PSCs) are appealing for their flexibility and high power-to-weight ratios. However, the fragile grain boundaries (GBs) in films can lead to stress strain cracks under bending conditions, limiting performance stability of F-PSCs. Herein, we show that film facilely achieve situ bifacial capping via introducing 4-(methoxy)benzylamine hydrobromide (MeOBABr) as precursor additive. The spontaneously formed MeOBABr layers flatten boundary grooves (GBGs), enable...
Abstract The power conversion efficiency (PCE) of perovskite solar cells (PSCs) is approaching their Shockley‐Queisser (S‐Q) limit through numerous efforts in key parameters improvement. To further the limit, it important to facilitate fill factor (FF), a parameter closely related carrier transport and nonradiative recombination. Herein, an interfacial bridging strategy proposed improve FF, which utilizes functional graphene quantum dots at tin oxide (SnO 2 )/perovskite buried interface. As...
A highly efficient and stable ideal-bandgap perovskite solar cell based on a defect-less formamidinium (FA) Sn–Pb light-absorbing layer is grown fluorinated substrate via top-down crystallization.
Buried interface modification is promising for preparing high-performance perovskite solar cells (PSCs) by improving the film quality and adjusting interfacial energy level alignment. In this work, multifunctional ethylenediaminetetraacetic acid diammonium (EAD)-modulated ZnO employed as an effective buried to regulate interplay between SnO2 CsPbI2Br in carbon-based inorganic PSCs (C-IPSCs). The burying of EAD into interlayer not only enhances photoelectric properties passivating oxygen...
In this work, cesium salts with functional anions of acetate (Ac − ), fluoride (F ) and trifluoroacetate (TFA are explored to modulate the deposition ZnO films in low-temperature carbon-based CsPbI 2 Br perovskite solar cells.
The charge recombination resulting from bulk defects and interfacial energy level mismatch hinders the improvement of power conversion efficiency (PCE) stability carbon-based inorganic perovskite solar cells (C-IPSCs). Herein, a series small molecules including ethylenediaminetetraacetic acid (EDTA) its derivatives (EDTA-Na EDTA-K) are studied to functionalize zinc oxide (ZnO) interlayers at SnO2 /CsPbI2 Br buried interface boost photovoltaic performance low-temperature C-IPSCs. This...
We present a facile strategy to improve the conductivity and homogeneousness of nickel oxide nanoparticles (NiOx NPs). The inverted flexible perovskite solar cells (F-PSCs) prepared with NiOx achieved impressive efficiencies...
Abstract The inverted perovskite solar cells (PSCs) based on inorganic metal oxide hole transport layers (HTLs) bear the merits of high device stability and low material cost. However, existence metal‐vacancy defects surface layer is a key constraint achieving efficiency stability, like case well‐known nickel (NiO x ) HTL. Here, cobalt (CoO HTL with defect‐less prepared by solution process using Co(OH) 2 as source water an eco‐friendly solvent for first time. PSCs CoO show superior thermal...
N-type tin oxide (SnO2) films are commonly used as an electron transport layer (ETL) in perovskite solar cells (PSCs). However, SnO2 of poor quality due to facile agglomeration under a low-temperature preparation method. In addition, energy level mismatch between the and (PVK) well interfacial charge recombination would cause open-circuit voltage loss. this work, alkali metal oxalates (M-Oxalate, M = Li, Na, K) doped into precursor solve these problems. First, it is found that hydrolyzed...
Hydrophobic organic ammonium halide salts are used to passivate perovskite defects, adjust interfacial energy level alignments, and ultimately improve the efficiency stability of low-temperature carbon-based CsPbI 2 Br solar cells.
Defective grain boundaries (GBs) and surface trap states are detrimental to the efficiency stability of perovskite solar cells (PSCs). In this research, ionic liquid (IL) is used control defect at GBs. The newly formed (EMIm)xMA1–xPb[(BF4)xI1–x]3 interlayer promotes secondary growth diminish GBs; besides, EMIM+ BF4– fill vacancies MA+ I– also passivate undercoordinated Pb2+ states. interface largely reduces nonradiative recombination, thus enhancing solar-cell performance 19.0% (AM 1.5, 1...
In inverted perovskite solar cells, the [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/Ag back interface is quite important because serious recombination occurs and H2O/O2 directly attacks this to induce device instability. Here, bi-functional dipole layers are applied at aiming improving charge transport stability simultaneously. Silane with -CF3 end group anchored on PCBM surface induces more effective effect than that (CH2)7-CH3 functional silane, bending energy level promote electron...
We report a solution-processing method to prepare an inorganic LaNiO3 (LNO) hole-transport layer (HTL) under low temperature (<150 °C) for the first time. The inverted PSCs prepared with LNO exhibit high UV-stability and promising efficiency (17.15%). Our preliminary results show great potential HTL in fabrication of efficient photostable perovskite solar cells (PSCs).
Comprehensive Summary Formamidinium (FA)‐based Sn‐Pb perovskite solar cells (FAPb 0.5 Sn I 3 PSCs) with ideal bandgap and impressive thermal stability have caught enormous attention recently. However, it still suffers from the challenge of realizing high efficiency due to surface imperfections transport materials energy‐level mismatch between functional contacts. Herein, is demonstrated that modification on buried interface alkali metal salts a viable strategy alleviate these issues. We...
Abstract Though Sn‐Pb alloyed perovskite solar cells (PSCs) achieved great progress, there is a dilemma to further increase Sn for less‐Pb requirement. High ratio (>70%) exhibits nonstoichiometric Sn:Pb:I at film surface aggravate 2+ oxidation and interface energy mismatch. Here, ternary metal (FASnI 3 ) 0.7 (MAPb 1− x Zn I 0.3 ( = 0–3%) constructed Pb% < 30% perovskite. with smaller ionic size stronger interaction than Sn/Pb assists forming high‐quality ZnI 6 4− enriched balance...
In perovskite solar cells (PSCs), a defective (PVK) surface and cliff-like energy offset at the interface always slow down charge extraction; meanwhile, ion diffusion causes oxidation of metal electrode, inducing device instability. Here, in situ grown 2D-(CH3 NH2 )3 Sb2 I9 (MA3 ) on back MAPbI3 results more robust interface. MA3 changes to p-type thus acts like field drive extraction suppress recombination, resulting an obviously higher fill factor (FF) = 0.8 power conversion efficiency...