Article
Chemistry, Physical
Zhaoping Chen, Qin Wang, Yao Tong, Xiaoting Liu, Jialong Zhao, Biaolin Peng, Ruosheng Zeng, Shuang Pan, Bingsuo Zou, Weidong Xiang
Summary: A facile strategy for producing flexible films containing CsPbBr3 nanocrystals has been reported, allowing for large-area coverage of white-light emission. These films exhibit excellent performance and are suitable for practical ultra-high-definition displays.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Zhaoping Chen, Qin Wang, Yao Tong, Xiaoting Liu, Jialong Zhao, Biaolin Peng, Ruosheng Zeng, Shuang Pan, Bingsuo Zou, Weidong Xiang
Summary: This study presents a simple strategy for producing flexible films containing CsPbBr3 PNG, achieving tunable green emission and expanding the color gamut of whitelight-emitting sources. The prepared PNG films exhibit excellent performance, showing promise for practical applications in ultra-high-definition displays.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
V. G. Vasavi Dutt, Syed Akhil, Rahul Singh, Manoj Palabathuni, Nimai Mishra
Summary: This study investigates the use of benzoic acid post-treatment to improve the photoluminescence and long-term stability of perovskite nanocrystals. The surface defects are passivated via co-ordination of carboxyl group with under coordinated surface lead atoms, leading to enhanced photoluminescence efficiency and stability.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Kazushi Enomoto, Risa Oizumi, Naoya Aizawa, Takayuki Chiba, Yong-Jin Pu
Summary: Research shows that cesium lead halide perovskite nanocrystals, composed of the same halogen composition but with different sizes, can effectively suppress concentration quenching and exhibit high optical stability. The combination of blue-emitting and green-emitting nanocrystals in an energy donor-acceptor system demonstrates improved photoluminescence quantum yield in the film state, attributed to efficient suppression of concentration quenching through FRET from the blue-emitting nanocrystals to the green-emitting nanocrystals.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Computer Science, Information Systems
Ching-Ho Tien, Ni-Pin Yeh, Kuan-Lin Lee, Lung-Chien Chen
Summary: In this study, a display consisting of a 64-cell quantum dot light-emitting diodes (QDLEDs) array was presented, with high operating rate and maximum brightness achieved. The surface modification of perovskite nanocrystal composite using aloe-vera gel as the organic precursor enabled high-quality narrow band photoluminescence emission. The use of an Arduino microcontroller unit for dynamic micro-control terminal and motor drive modules for the display driver circuit demonstrates the potential of perovskite devices for next-generation displays.
Article
Chemistry, Physical
Xinyu Shen, Hua Wu, Xiaoyu Zhang, Meili Xu, Junhua Hu, Jinyang Zhu, Bin Dong, William W. Yu, Xue Bai
Summary: The all-solution process for inorganic perovskite nanocrystals (PNCs) LEDs shows great potential for new-generation illumination and displays, but the challenge lies in the injection barriers and charge injection imbalance. The introduction of CBP into the hole transport layer (HTL) efficiently modulates the charge carrier mobility and energy level, resulting in barrier-free charge injection and optimal performance for solution-processed PNC LEDs. The luminance of red LEDs reaches 2990 cd m(-2) and the external quantum efficiency achieves 8.1%, with improved turn-on voltage and roll-off due to more balanced charge injection.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Li Song, Lixin Huang, Yuan Liu, Xiaoyang Guo, Chong Geng, Shu Xu, Yuanqin Xia, Yuan Zhang, Nannan Luan, Yongsheng Hu
Summary: An efficient bilateral interfacial defect passivation strategy was demonstrated for high-performance PeLEDs based on thermally deposited CsPbBr3, which significantly suppressed nonradiative defects and balanced charge injection effectively, resulting in PeLEDs with high luminance, current efficiency, external quantum efficiency, and lifetime.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Optics
Dongdong Yan, Shuangyi Zhao, Yubo Zhang, Huaxin Wang, Zhigang Zang
Summary: CsPbBr3 perovskite quantum dots with excellent stability and efficient emission were synthesized by using 2-hexyldecanoic acid as a ligand. Warm white light-emitting diodes were constructed by combining the modified CsPbBr3 QDs with other quantum dots and emitting chips, showing high color quality and efficiency.
OPTO-ELECTRONIC ADVANCES
(2022)
Article
Engineering, Environmental
Yang Liu, Yuelei Li, Xudong Hu, Changting Wei, Bo Xu, Jing Leng, Haibo Miao, Haibo Zeng, Xiaoming Li
Summary: Surface ligands play important roles in the growth and stability of quantum dots (QDs). This study investigates the influence of dodecylbenzene sulfonic (DBSA) ligand on perovskite QDs (PQDs). The results show that DBSA-capped PQDs exhibit abnormally ripening under high-temperature conditions. A new mechanism for ion migration suppression is proposed based on internal lattice relaxation and inter-particle migration pathway elimination. However, the external quantum efficiency of the corresponding light-emitting devices is poor, which could be attributed to the unbalanced colloidal stability and film conductivity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Songman Ju, Chaomin Mao, Jinping Zheng, Kaiyu Yang, Lihua Lin, Tailiang Guo, Hailong Hu, Fushan Li
Summary: This work proposes a new strategy to enhance the electroluminescent performance of perovskite quantum dots (PQDs) by creating a PQD film. By manipulating the ion distribution and trap density in the PQD film through varying pre-bias voltage and time, the device's capacitance value and luminous efficiency can be modified. The external quantum efficiency of the device increased from 2.81% to 7.95% through this strategy. This research provides a new approach for achieving perovskite quantum dot light-emitting devices with high luminous efficiency.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mingyuan Xie, Jie Guo, Xiaoyu Zhang, Chenghao Bi, Lin Zhang, Zema Chu, Weitao Zheng, Jingbi You, Jianjun Tian
Summary: This study presents a solution to achieve high-efficiency pure-red perovskite light-emitting diodes (PeLEDs) by stabilizing the structure of quantum dots and reducing adverse effects. The use of composite ligands helped stabilize the strong-confined quantum dots and suppress Auger recombination in the devices. Additionally, adjustments in the valence band of the quantum dots improved charge injection balance in the PeLEDs.
Article
Engineering, Environmental
Siwei He, Neetesh Kumar, Hock Beng Lee, Keum-Jin Ko, Young-Jin Jung, Jin Il Kim, Sukang Bae, Jeong-Hwan Lee, Jae-Wook Kang
Summary: Introducing a short-chain ammonium moiety PEABr to passivate the surface of CsPbBr3 PeQDs effectively eliminates intrinsic bromide vacancies and tunes the refractive index, boosting the performance and stability of PeQLEDs.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Chenghao Bi, Zhiwei Yao, Xuejiao Sun, Xuecheng Wei, Junxi Wang, Jianjun Tian
Summary: The research achieved pure-blue emitting small-sized CsPbBr3 perovskite quantum dots with high quantum efficiency and stability through a novel acid etching-driven ligand exchange strategy. The PeLEDs based on these quantum dots demonstrated significant progress in brightness, pure blue electroluminescence, and durability.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zhong Fu, Likuan Zhou, Yue Yin, Kangkang Weng, Fu Li, Shaoyong Lu, Dan Liu, Wenyong Liu, Longjia Wu, Yixing Yang, Haifang Li, Lian Duan, Hai Xiao, Hao Zhang, Jinghong Li
Summary: Researchers report a new method called light-triggered, carbocation-enabled ligand stripping (CELS) to pattern quantum dot light-emitting diodes (QLEDs) with high efficiency and stability. This method shows promising results for building high-performance QLED displays and related integrated devices.
Article
Chemistry, Multidisciplinary
Meng Fan, Jinpeng Huang, Lyudmila Turyanska, Zhenfeng Bian, Liancheng Wang, Chunyang Xu, Nan Liu, Hongbo Li, Xiaoyu Zhang, Chengxi Zhang, Xuyong Yang
Summary: CsPbX3/SBA-15 nanocomposites with outstanding optical properties and high stability are prepared using mesoporous silica particles through an in situ growth strategy. The mesoporous structure provides a strong waveguide effect on perovskite QDs and the uniform dispersion suppresses reabsorption losses, improving the overall photoconversion efficiency. The fabricated perovskite monochromatic LED has the highest reported luminous efficiency of 183 lm W-1, and the white devices exhibit high luminous efficiency (116 lm W-1) and wide color gamut.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yu Lu, Yang Shen, Yan-Qing Li, Kong-Chao Shen, Wei Zhou, Jian-Xin Tang
Summary: The electron durability and deterioration mechanism of phenethylammonium (PEA(+))-modified reduced-dimensional metal halide perovskites (RD-MHPs) are systematically studied using an in situ photoelectron spectroscopy technique. The experiment reveals the formation of detrimental metallic lead (Pb-0) and the decomposition of PEA(+) under electron-beam radiation, which changes the photophysical properties of PEA(+)-doped RD-MHPs. These findings provide deep insight into the impact of injected electrons on the performance of PEA(+)-doped perovskite LEDs and offer potential guidance for designing robust and effective organic spacers for RD-MHPs.
Article
Chemistry, Multidisciplinary
Da-Hao Wang, Jing-Feng Yao, Hao-Ze Li, Gui-Zhen Li, Feng-Ming Xie, Yan-Qing Li, Ying-Yuan Hu, Jian-Xin Tang, Xin Zhao
Summary: Achieving deep blue TADF materials with narrow emission is still challenging. In this study, two deep blue TADF emitters DCBTRZ and PPCTRZ were designed and synthesized by using host materials as donors and TRZ as an acceptor. Both emitters exhibited deep blue fluorescence with a narrow FWHM of 42 nm and high PLQYs in doped films. Devices based on DCBTRZ and PPCTRZ achieved deep blue emission with high EQEs and exhibited high color purity.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Yehui Xu, Shaobing Xiong, Sheng Jiang, Jianming Yang, Dong Li, Hongbo Wu, Xiaomeng You, Yefan Zhang, Zaifei Ma, Jianhua Xu, Jianxin Tang, Yefeng Yao, Zhenrong Sun, Qinye Bao
Summary: It is reported that using daminozide (DA) as an interlayer and additive can effectively suppress nonradiative recombination in perovskite solar cells, leading to improved power conversion efficiency and operational stability.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jing De Chen, Hui-Min Liu, Hao Ren, Ye-Fan Zhang, Hong-Yi Hou, Yan-Qing Li, Zisheng Su, Jian-Xin Tang
Summary: Semitransparent organic solar cells face challenges in color tunability. This study proposes a method using amorphous photonic crystals as substrates to achieve viewing-angle-independent color reflection, showing variations from blue to pink. The cells on flexible plastic also maintain stable colors even in bending state.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Xin-Yi Zeng, Yan-Qing Tang, Xiao-Yi Cai, Jian-Xin Tang, Yan-Qing Li
Summary: Low-cost and large-scale fabrication technologies are highly desirable for fabricating organic light-emitting diodes (OLEDs) for applications in full-color displays and solid-state lighting. Printed OLEDs have attracted extensive attention and have great application potential in various fields. This review provides an introduction to the development background and advantages of solution-processed OLEDs for printing displays, summarizes research progress in light-emitting materials and basic theories of solution-processed OLEDs, and discusses the characteristics of the printing preparation process and related challenges. Additionally, a brief perspective on the future development trend and infinite potential of printed OLEDs is presented for the commercialization of printing displays.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Ye-Fan Zhang, Hao Ren, Jing-De Chen, Hong-Yi Hou, Hui-Min Liu, Shuo Tian, Wei-Shuo Chen, Heng-Ru Ge, Yan-Qing Li, Hongying Mao, Zisheng Su, Jian-Xin Tang
Summary: In this study, a passive cooling strategy is proposed to achieve stable flexible organic solar cells (FOSCs) by enhancing the optical-thermal radiative transfer. A spectrally selective coupling structure is integrated into FOSCs to enhance infrared radiation out-coupling and limit near-infrared absorption-induced heat generation. The results show reduced heat power intensity and working temperature, with FOSCs achieving a power conversion efficiency of over 17% and a prolonged T-80 lifetime of one year under real outdoor working conditions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yi-Hui He, Feng-Ming Xie, Kai Zhang, Dezhi Yang, Yang Shen, Hao-Ze Li, Dongge Ma, Yan-Qing Li, Jian-Xin Tang
Summary: Rod-like orange-red TADF emitters of 2BNCz-PZ and 2BNtCz-PZ with A-D-A configuration are developed, achieving highly efficient emission. The optimized orange-red OLED based on 2BNtCz-PZ exhibits a maximum EQE of 31.0% and a slight EQE roll-off to 22.2% at 1 000 cd m(-2) with emission peak over 600 nm.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wei Zhou, Yang Shen, Long-Xue Cao, Yu Lu, Ying-Yi Tang, Kai Zhang, Hao Ren, Feng-Ming Xie, Yan-Qing Li, Jian-Xin Tang
Summary: This study has successfully achieved spectrally stable emission of blue PeLEDs by using bifunctional passivators of Lewis-base benzoic acid anions and alkali metal cations. By passivating the under-coordinated lead atoms and suppressing halide ion migration, the performance of the devices has been improved significantly, achieving high external quantum efficiency.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Deyu Gao, Ru Li, Xihan Chen, Cong Chen, Chenglin Wang, Boxue Zhang, Mengjia Li, Xueni Shang, Xuemeng Yu, Shaokuan Gong, Thierry Pauporte, Hua Yang, Liming Ding, JianXin Tang, Jiangzhao Chen
Summary: A strategy for managing interfacial defects and carrier dynamics through the modulation of functional groups and spatial conformation of ammonium salt molecules is proposed. The use of 3-APAI surface treatment and 5-aminopentanoic acid hydroiodide post-treatment leads to the formation of 2D perovskite passivation layers, resulting in improved photovoltaic performance.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Xiaoguo Li, Fengming Xie, Saqib Rafique, Haoliang Wang, Liangliang Deng, Zejiao Shi, Yaxin Wang, Xin Zhang, Kai Liu, Yanyan Wang, Yiyi Pan, Fengcai Liu, Chongyuan Li, Tianxiang Hu, Jiao Wang, Anran Yu, Jianxin Tang, Yiqiang Zhan
Summary: Polyethylene naphthalate (PEN) is used in flexible perovskite solar cells (FPSCs) due to its chemical stability and temperature tolerance. The poor transmittance in the UV region hampers the power conversion efficiency (PCE) of F-PSCs. A novel strategy of introducing UV-visible downshifting material before the PEN substrate increases the spectral response and improves the PCE of F-PSCs to 22.81%. The improved device also exhibits enhanced photocurrent and humidity resistance.
Article
Nanoscience & Nanotechnology
Feng-Ming Xie, Hao-Ze Li, Kai Zhang, Han-Yang Wang, Yan-Qing Li, Jian-Xin Tang
Summary: In this study, an aggregation-induced MR-TADF material 6TBN was designed to overcome the challenges of concentration quenching and spectral broadening. The multidimensional shielded effect effectively limits aggregation and spectral broadening, leading to high color purity. OLEDs based on 6TBN showed high quantum efficiency and pure color emission. This work provides a feasible strategy to achieve MR-TADF materials with resistance to concentration quenching and high color purity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yong-Chun Ye, Yang Shen, Wei Zhou, Shi-Chi Feng, Jiang-Ying Wang, Yan-Qing Li, Jian-Xin Tang
Summary: Perovskite light-emitting diodes (PeLEDs) show promise for next-generation high-definition displays due to their excellent color purity and low power consumption. A novel strategy of interfacial molecule control is demonstrated using a bifunctional material to enhance interaction and exciton management between the perovskite and electron-transport layers. This modification layer not only passivates surface defects but also blocks interfacial exciton transfer, resulting in improved external quantum efficiencies for green, blue, and red emissions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yong-Chun Ye, Li Chen, Xian-Min Chen, Chun-Ying Ma, Bing-Hao Lv, Jiang-Ying Wang, Wei-Dong Dou, Chu Zhang, Ting-Li Ma, Jian-Xin Tang
Summary: The use of a molecule bridging layer between tin oxide and perovskite enables better energy level alignment and superior interfacial contact, resulting in improved conductivity and electron extraction in perovskite solar cells. The modified cells achieve high power conversion efficiencies of 23.25% and 20.23% for different device sizes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hong-Yi Hou, Shuo Tian, Jing-De Chen, Hong-Hui Ling, Hao Ren, Ye-Fan Zhang, Heng-Ru Ge, Wei-Shuo Chen, Yan-Qing Li, Hongying Mao, Hisao Ishii, Jian-Xin Tang
Summary: This research proposes a spectrally selective hole extraction structure (SHE) for high-efficiency solar-blind photodetectors. The structure enables narrowband absorption and optimized charge extraction in the solar-blind region, resulting in higher responsivity and detectivity for the device.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Shi-Chi Feng, Xin-Mei Hu, Yang Shen, Yan-Qing Li, Jian-Xin Tang, Shuit-Tong Lee
Summary: Quasi-2D perovskites have gained significant attention in high-quality displays for their superior optoelectronic properties compared to 3D counterparts. The n-value distribution of quasi-2D perovskites has a strong impact on the electroluminescence efficiency and stability of perovskite light-emitting diodes (PeLEDs). This review provides an introduction to the crystal structure, formation mechanism, and multiple-quantum-well characteristics of quasi-2D perovskites, as well as a comprehensive summary of mainstream strategies for regulating the phase distribution to improve PeLED performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)