A5025265646- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Molecular Junctions and Nanostructures
- Organic Light-Emitting Diodes Research
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Thin-Film Transistor Technologies
- Chalcogenide Semiconductor Thin Films
- solar cell performance optimization
- Semiconductor materials and interfaces
South China University of Technology
2015-2024
Guangdong University of Technology
2024
State Key Laboratory of Luminescent Materials and Devices
2016-2017
Abstract A major challenge for organic solar cell (OSC) research is how to minimize the tradeoff between voltage loss and charge generation. In early 2019, we reported a non-fullerene acceptor (named Y6) that can simultaneously achieve high external quantum efficiency low OSC. Here, use combination of experimental theoretical modeling reveal structure-property-performance relationships this state-of-the-art OSC system. We find distinctive π–π molecular packing Y6 not only exists in single...
Solution processed zinc oxide (ZnO) nanoparticles (NPs) with excellent electron transport properties and a low-temperature process is viable candidate to replace titanium dioxide (TiO2) as layer develop high-efficiency perovskite solar cells on flexible substrates. However, the number of reported high-performance using ZnO-NPs still limited. Here we report detailed investigation chemistry crystal growth CH3NH3PbI3 ZnO-NP thin films. We find that films would severely decompose into PbI2 upon...
The contact between the n-type interlayer and donor provides an extra interface for charge dissociation.
Abstract While the performance of laboratory‐scale organic solar cells (OSCs) continues to grow over 13%, development high‐efficiency large area OSCs still lags. One big challenge is that formation bulk heterojunction morphology an extremely complicated process and formed also a highly delicate balance involving many parameters such as domain size, purity, miscibility, etc. The control becomes much more challenging when device scaled up. In this work, efficient (12.9%) nonfullerene cell...
Abstract Benefiting from low cost and simple synthesis, polythiophene (PT) derivatives are one of the most popular donor materials for organic solar cells (OSCs). However, polythiophene‐based OSCs still suffer inferior power conversion efficiency (PCE) than those based on donor–acceptor (D–A)‐type conjugated polymers. Herein, a fluorinated derivative, namely P4T2F‐HD, is introduced to modulate miscibility morphology bulk heterojunction (BHJ)‐active layer, leading significant improvement OSC...
Two chemically tailored new conjugated copolymers, HSL1 and HSL2, were developed applied as hole selective layers to improve the anode interface of fullerene/perovskite planar heterojunction solar cells. The introduction polar functional groups on polymer side chains increases surface energy (HSLs), which promote better wetting with perovskite films lead full coverage high crystallinity. deep highest occupied molecular orbital levels HSLs align well valence band semiconductors, resulted in...
Ternary blending of light-harvesting materials has been proven to be a potential strategy improve the efficiency solution-processed organic solar cells (OSCs). However, optimization ternary system is usually more complicated than that binary one as morphology conventional blend films very difficult control, thus undermining OSCs. Herein, we report general for better control composed polymer donor and two nonfullerene small-molecule acceptors high-performance OSCs using sequential...
Abstract Organic solar cells (OSCs) containing non‐fullerene acceptors have realized high power conversion efficiency (PCE) up to 14%. However, most of these high‐performance OSCs been reported with optimal active layer thickness about 100 nm, mainly due the low electron mobility (≈10 −4 –10 −5 cm 2 V −1 s ) acceptors, which are not suitable for roll‐to‐roll large‐scale processing. In this work, an efficient OSC based on...
Nonfullerene organic solar cells (OSCs) have achieved an impressive power conversion efficiency (PCE) over the past few years, showing a great potential for real applications. However, study on photostability and degradation mechanism of nonfullerene OSCs is far behind than that fullerene‐based cells, which crucial commercial applications technology. Herein, efficient stable OSC based PCE10:rhodanine‐benzothiadiazole‐coupled indacenodithiophene with branched 2‐ethylhexyl side chains (EH‐IDT)...
2PACz-modified NiO x thin films successfully replace PEDOT:PSS as hole transport layers, and achieve a high PCE of 16.7% in the PM6:Y6-based organic solar cells with simultaneous enhancement efficiency, stability reproducibility.
Abstract Operational stability is the main obstacle to industrial applications of organic solar cells (OSCs). In this study, different degradation mechanisms under continuous simulated radiation are demonstrated for high‐performance non‐fullerene OSCs based on commonly used electron transport materials, i.e., ZnO and SnO 2 . The ZnO‐induced decomposition pathways A‐DA'D‐A type acceptors (NFAs) UV illumination unraveled first time related N‐dealkylation pyrrole from core moiety. case , poor...
Abstract In this study the thickness of PTB7‐Th:PC 71 BM bulk heterojunction (BHJ) film and PF3N‐2TNDI electron transport layer (ETL) is systematically tuned to achieve polymer solar cells (PSCs) with optimized power conversion efficiency (PCE) over 9% when an ultrathin BHJ 50 nm used. Optical modeling suggests that high PCE attributed optical spacer effect from ETL, which not only maximizes field within but also facilitates formation a more homogeneously distributed charge generation...
Unconventional fluorescence emission of non-conjugated lignin-SAF (GSL) was reported and GSL-doped PEDOT showed high performance in organic electronics.
We have systematically investigated the synergistic effect of thermal annealing and interlayer modification on improving performance inverted non-fullerene organic solar cells.
Two wide bandgap conjugated polymers were constructed, exhibiting PCEs up to 7.45% and <italic>V</italic><sub>OC</sub>'s over 0.95 V.
Abstract Zinc oxide (ZnO) is widely used as an electron transporting layer (ETL) for organic solar cells (OSCs). Here, a low‐cost commercial water/alcohol‐soluble fluorescent conversion agent, sodium 2,2′‐([1,1′‐biphenyl]−4,4′‐diyldivinylene)‐bis(benzenesulfonate) (CBS), incorporated into ZnO to develop novel organic‐inorganic hybrid ETL high‐performance OSCs. The photoinduced charge transfer from CBS significantly improves the transport properties of ZnO, resulting in faster extraction and...
The device based on PBDT-BTP-OD with IT-M exhibited power conversion efficiency of up to 9.54% thanks the synergistic effect distorted lactam motif and side-chain engineering.
The power conversion efficiencies (PCE) of polymer solar cells have now both reached over 17% for single-junction and multi-junction devices. However, in order the meet commercialization requirement, further improvement device stability exploration niche applications are urgently needed. In this talk, I will discuss how to utilize an integrated strategy combining material design, interface engineering optical management tackle efficiency challenges cells. molecular structures, crystal thin...