A5100739728- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Advanced Wireless Communication Techniques
- Advanced Photocatalysis Techniques
- Wireless Communication Networks Research
- Error Correcting Code Techniques
- Metallic Glasses and Amorphous Alloys
- Magnetic properties of thin films
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- TiO2 Photocatalysis and Solar Cells
- Energetic Materials and Combustion
- Advanced Computational Techniques and Applications
- Magnetic Properties and Applications
- Remote Sensing and Land Use
- Thermal and Kinetic Analysis
- Hydrological Forecasting Using AI
- Crystallization and Solubility Studies
- Magnetic Properties of Alloys
- Transition Metal Oxide Nanomaterials
- PAPR reduction in OFDM
- Tropical and Extratropical Cyclones Research
- Environmental Changes in China
East China Normal University
2009-2024
Chinese Academy of Sciences
2018-2019
Ningbo Institute of Industrial Technology
2018-2019
University of Virginia
2014
Dalian University of Technology
2013-2014
Dalian Naval Academy
2011
Singapore Polytechnic
2010
Harbin Normal University
2008
University of Toledo
2006
Nokia (United States)
2003
A stable perovskite heterojunction was constructed for inverted solar cells through surface sulfidation of lead (Pb)-rich films. The formed lead-sulfur (Pb-S) bonds upshifted the Fermi level at interface and induced an extra back-surface field electron extraction. resulting devices exhibited a power conversion efficiency (PCE) >24% with high open-circuit voltage 1.19 volts, corresponding to low loss 0.36 volts. strong Pb-S could stabilize heterojunctions strengthen underlying structures that...
We have suggested bit-interleaved coded modulation with soft decision iterative decoding (BICM-ID) for bandwidth-efficient transmission over Gaussian and fading channels. Unlike trellis modulation, BICM-ID has a small free Euclidean distance but large diversity order due to bit interleaving. With decoding, decisions can be employed significantly improve the conditional intersignal distance. This leads coding gain, comparable that of turbo TCM, both Rayleigh channels much less system...
A simple iterative decoding technique using hard-decision feedback is presented for bit-interleaved coded modulation (BICM). With an 8-state, rate-2/3 convolutional code, and 8-PSK modulation, the improvement over conventional BICM scheme exceeds 1 dB a fully-interleaved Rayleigh flat-fading channel 1.5 with additive white Gaussian noise. This robust performance makes suitable both types of channels.
An efficient electron transport layer (ETL) plays a key role in promoting carrier separation and extraction planar perovskite solar cells (PSCs). effective composite ETL is fabricated using carboxylic-acid- hydroxyl-rich red-carbon quantum dots (RCQs) to dope low-temperature solution-processed SnO2 , which dramatically increases its mobility by ≈20 times from 9.32 × 10-4 1.73 10-2 cm2 V-1 s-1 . The achieved one of the highest reported mobilities for modified Fabricated PSCs based on this...
Long-term operational stability is the foremost issue delaying commercialization of perovskite solar cells (PSCs). Here we demonstrate an in-situ cross-linking strategy for operationally stable inverted MAPbI
Tin-lead (Sn-Pb) perovskite solar cells (PSCs) with near-ideal bandgap still lag behind the pure lead PSCs. Disordered heterojunctions caused by inhomogeneous Sn/Pb ratio in binary film induce large recombination loss. Here, an Sn-Pb is reported homogeneous component and energy distribution introducing hydrazine sulfate (HS) Sn precursor. HS can form hydrogen bond network coordinate FASnI3 thus no longer Pb2+ , which reduces crystallization rate of tin to level analog. The strong bonding...
Inverted CsPbI3 commonly exhibits a more p-type surface than bulk, which induces severe interfacial recombination and, thus, limits the device's Voc and efficiency in inverted perovskite solar cells (PSCs). Here, gradual CsPbI3/PbS heterojunction is constructed to inhibit such through situ chemical sulfidation with N,N′-diphenylthiourea (DPhTA). DPhTA can directly react form PbS induce p- n-type transition at surface, leads energy level bending downward establishing top of region. PSCs...
This paper considers bit-interleaved coded modulation (BICM) for bandwidth-efficient transmission using software radios. A simple iterative decoding (ID) method with hard-decision feedback is suggested to achieve better performance. The shows that convolutional codes good Hamming-distance property can provide both high diversity order and large free Euclidean distance BICM-ID. offers a common framework over channels variety of fading statistics. In addition, BICM-ID allows an efficient...
Chemical anticorrosion of metal electrode with benzotriazole inhibitor enhances the stability perovskite solar cells.
CsPbI3 perovskite solar cells (PSCs) have revealed promising applications for high-performance photovoltaic devices. Despite the high efficiency regular PSCs, poor stability adverse dopants reflects importance of inverted. However, inverted lag far a phase transition and inferior films. Here, we report an effective post-treatment agent, methylammonium pyridine-2-carboxylic (MAPyA), to heal stabilize MAPyA on can decompose into methylamine (MA) gas pyridine-2-carboxylate (PyA–) at 100 °C, MA...
All-inorganic CsPbI2Br perovskite solar cell with an inverted architecture of indium-tin oxide/poly[3-(4-carboxylbutyl)thiophene]/CsPbI2Br/(6,6)-phenyl-C61-butyric acid methyl ester/C60/bathocuproine/Ag was fabricated. Together the incorporation nickel iodide, crystallinity and film morphology were promoted. Also, suppressed trap-state density in accomplished due to passivation effect. Consequently, enhanced champion efficiency 13.88% VOC 1.141 V, JSC 16.02 mA/cm2, fill factor 75.96%...
Environment-friendly protic amine carboxylic acid ionic liquids (ILs) as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic in achieving efficient stable perovskite solar cells (PSCs) simple one-step air processing without an antisolvent treatment approach. However, it remains mysterious for the improved efficiency stability of PSCs any passivation strategy. Here, we unambiguously demonstrate that three functions solvents, additive, are present...
Ion migration, especially I− is a main issue limiting the stability of perovskite solar cells (PSCs). Here, we introduce multifunctional additive dipentaerythritol pentaacrylate (DPPA) into films to suppress ion migration. The CH2CH groups in DPPA will crosslink at grain boundaries and block channels Importantly, alkoxy (–O–CH2) hydroxyl (–OH) can bond with FA+ ions through hydrogen interaction, chemically immobilizing these migrated ions. As result, migration effectively inhibited owing...
One big challenge limiting the stability of perovskite solar cells (PSCs) is that iodine species produced in tend to diffuse and escape from PSCs, accelerating decomposition destroying other functional layers as well. Motivated by idea confinement lithium–iodine batteries, here an confining strategy proposed fabricate stable PSCs incorporating poly(2-vinylpyridine) (P2VP) into film. P2VP can effectively bond with product inhibit its diffusion volatilization thus suppressing device...
An iodine trapping strategy is proposed to inhibit the escaping in perovskite and realize light-heat stable solar cells, retaining over 80% of initial efficiency after maximum power point tracking for 300 h at 85 °C.
Abstract Ag electrode is widely used in inverted perovskite solar cells (PSCs), but its easy reaction and corrosive nature with always induces severe stability issue. Here, from typical theory of metal anticorrosion, a chemical anticorrosion approach for PSCs through introducing 2‐mercaptobenzothiazole (MBT) as corrosion inhibitor reported. MBT can strongly bond to form compact [MBT‐Ag] chain on surface owing N atom thiazolyl ring exocyclic thiol groups. As result, ability greatly enhanced...
Highlights A simple and multifunctional surface treatment strategy is proposed to address the inferior-performance inverted CsPbI 2 Br perovskite solar cells (PSCs). The induced-ions exchange can align energy levels, passivate both GBs surface, gift solid protection from external erosions. PSCs reveal a champion efficiency of 15.92% superior stability after moisture, operational, thermal ages. Abstract Developing high-efficiency stable vitally urgent for their unique advantages removing...
Abstract Inverted triiodine cesium lead (CsPbI 3 ) perovskite solar cells (PSCs) are promising in photovoltaics owing to their ideal light absorption, non‐volatile active layer, and avoidance of fragile Spiro‐OmeTAD, especially as the top cell tandem devices. However, they still exhibit far‐lagging efficiency, must be processed a strictly controlled environment due water‐fearing CsPbI . Here, novel strategy convert harmful water erosions into an situ stabilizer for efficient inverted PSCs...
Bit-interleaved coded modulation (BICM) was originally suggested by Zehavi (1992) to increase the time diversity of over Rayleigh fading channels. In its typical design with Gray signal labeling, BICM causes a degradation Gaussian channels, compared conventional trellis-coded modulation. We show that bit interleaving can actually be used Euclidean distance between codewords convolutional code. With iterative decoding and careful labeling interleaving, provide great performance even for
Chirality plays a vital role in material properties, and precise control of chiral signals is key to designing functional materials. Supramolecular self‐assembly offers an efficient means integrate building blocks with chromophores, yet controlling the assembly pathway remains challenging due complexity non‐covalent interactions. Here, we introduce continuous parallel‐laminar‐assisted strategy that exploits solvent ordering solute diffusion confined environments regulate multi‐component...