CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Yanyan Peng,Dayong Jiang,Man Zhao,Mingyang Li,Haoda Li,Siyuan Li
Hybrid heterojunction photodetectors (PDs) have received widespread attention due to their excellent optoelectronic performance. This study investigated the combination of ZnO with organic–inorganic perovskites to develop a high-performance heterojunction hybrid PD. The developed PD showed optical responses of 0.70 and 0.86 A/W at 350 and 850 nm. The detectivity achieved values of 3.98 × 1011 and 4.92 × 1011 Jones, while the external quantum efficiency stood at 246.59 and 125.31%. In addition, the PD displays broad-band responsivity to illumination ranging from ultraviolet to near-infrared light. Incorporating [6,6]-phenyl-C61 butyric acid (PCBM) into the perovskite film to form a bulk heterojunction further enhances the responsivity, detectivity, and photoconductivity gain. This enhancement is attributed to the improved separation of electron–hole pairs, resulting in optical responses of 3.55 and 3.94 A/W at 350 and 850 nm, respectively. Moreover, detectivity was measured with values of 3.64 × 1012 Jones and 4.04 × 1012 Jones, with external quantum efficiencies of 1258.88% and 574.82%.
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NANO LETTERS
·
2024
·
IF 9.6
Yuan Qie,Hailong Hu,Kuibao Yu,Chao Zhong,Songman Ju,Yanbing Liu,Tailiang Guo,Fushan Li
The photolithographic patterning of fine quantum dot (QD) films is of great significance for the construction of QD optoelectronic device arrays. However, the photolithography methods reported so far either introduce insulating photoresist or manipulate the surface ligands of QDs, each of which has negative effects on device performance. Here, we report a direct photolithography strategy without photoresist and without engineering the QD surface ligands. Through cross-linking of the surrounding semiconductor polymer, QDs are spatially confined to the network frame of the polymer to form high-quality patterns. More importantly, the wrapped polymer incidentally regulates the energy levels of the emitting layer, which is conducive to improving the hole injection capacity while weakening the electron injection level, to achieve balanced injection of carriers. The patterned QD light-emitting diodes (with a pixel size of 1.5 μm) achieve a high external quantum efficiency of 16.25% and a brightness of >1.4 × 105 cd/m2. This work paves the way for efficient high-resolution QD light-emitting devices.
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ACS Nano
·
2024
·
IF 15.8
Qiaopeng Cui,Dingshuo Zhang,Yun Gao,Chao Fan,Qiuting Cai,Hongjin Li,Xiaohui Wu,Meiyi Zhu,Junjie Si,Xingliang Dai,Haiping He,Zhizhen Ye
Controlling interfacial reactions is critical for zinc oxide (ZnO)-based inverted perovskite light-emitting diodes (PeLEDs), boosting the external quantum efficiency (EQE) of the near-infrared device to above 20%. However, violent interfacial reactions between the bromine-based perovskites and ZnO-based films severely limit the performance of inverted green PeLEDs, whose efficiency and stability lag far behind those of their near-infrared counterparts. Here, a controllable interfacial amidation between the bromine-based perovskites and magnesium-doped ZnO (ZnMgO) film utilizing caprylyl sulfobetaine (SFB) is realized. The SFB molecules strongly interact with formamidinium bromide, decelerating the amidation reaction between formamidinium and carboxylate groups on the ZnMgO film, thus regulating the crystallization of FAPbBr3. Combined with the passivation of benzylamine, a FAPbBr3 bulk film directly deposited on a ZnMgO substrate with single-crystal characteristics is obtained, exhibiting a high photoluminescence quantum yield of above 80%. The resultant PeLEDs demonstrate a peak EQE of exceeding 20% at a high luminance of 120,000 cd m–2 and a half lifetime of 26 min at 11,000 cd m–2, representing the state-of-the-art inverted green electroluminescence. This work resolves the crucial issues of violent interfacial reactions and provides a strategy toward inverted green PeLEDs with outstanding performance.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Quan Nie,Junpeng Fan,Rui Xu,Zhiwei Yao,Yuqi Xiao,Chaoyu Xiang,Lei Qian,Ting Zhang
As one of the most promising next-generation display technologies, quantum dot light-emitting diodes (QLEDs) possess various advantages, such as high color purity, wide color gamut, high brightness, and solution processability. The preparation of quantum dot (QD) pixels is essential for commercializing QLED displays, and direct photolithography is considered an efficient method for fabricating ultra-high-resolution devices over large areas. However, the QD direct photolithography technology is still in its infancy. This study presents a novel direct photolithography technique based on a typical azide-alkyne click reaction. This method enables the cross-linking of adjacent QDs in an air environment using a 365 nm UV light source, and a low-energy dose (≈36 mJ cm −2 ). In addition, the QLEDs with crosslinked QD layers exhibit excellent performance, achieving a peak external quantum efficiency (EQE) of 20.05% and a maximum brightness over 166,000 cd m −2 at 5 V. Meanwhile, the QLEDs with pristine and photolithographic QDs exhibit comparable operational lifetime (T 95 ). It is believed that the novel direct photolithography technology based on azide-alkyne click reaction will advance the development of patterned QDs and facilitate the industrial production of ultra-high resolution QLED displays.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xuexia Li,Thumawadee Wongwirat,Linqi Li,Yuan Xi,Junji Wei,Lei Zhu
A new dipolar glass polymer, sulfonylated poly(ether ether ketone) (PPLM–PEEK-SO2), was designed and synthesized using the postfunctionalization of o-cresolphthalein units. The methyl sulfonyl group, as a side chain with a large dipole moment of 4.25 D, could well utilize the free volume (FV) provided by the rigid skeleton structure. This enhanced orientational polarization resulted in a high dielectric constant of 4.55 and a low loss of 0.0057 at 25 °C and 100 Hz for PPLM–PEEK-SO2. In addition, PPLM–PEEK exhibited excellent discharge energy density, and the discharge efficiency (η) maintained about 97% at room temperature when the electric field increased from 50 to 500 MV/m. And even at 150 °C and 300 MV/m, it can also be as high as 95.42%, which is suitable for high-temperature energy storage. Moreover, PPLM–PEEK-SO2 exhibited a higher energy storage density, such as 3.8 J/cm3 at 100 °C and 450 MV/m.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Zhuning Geng,Di Zheng,Zhen Qi,Qianli Xie,Guanghe Li,Fang Zhang
Direct current (DC) has promising potential for persulfate delivery and activation in heterogeneous site remediation, yet requires deeper understanding. Here, we investigated the efficiency of DC for persulfate delivery and activation and compared with alternating current (AC). While AC electric field only influenced persulfate fate by Joule heating effect, DC electric field induced electrokinetic migration of persulfate and contaminants, as well as promoted persulfate activation with Joule heating and electrochemical reactions. DC system achieved 95 % MCB removal which was 3.1 times of that in AC system using the same voltage input (60 V) with a velocity of 0.5 m/d. When the applied DC voltage increased from 20 V to 60 V (0.5–1.5 V/cm), persulfate activation pathway changed from electrode reactions to the coupled activation pathways of electrode, chemical and heat reactions, thus resulting in increasing MCB removal efficiency from 57 % (20 V) to 95 % (40 V and 60 V). The energy consumption with 40 V (11.6 kWh/g) was 2.6 times of that using 20 V (4.4 kWh/g), and dramatically increased to 11.7 times with 60 V (50.2 kWh/g). This study provides a new perspective on improving the efficiency of persulfate delivery and activation in heterogeneous sites remediation using DC-driven system.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yulong Wang,Xiuwen Xu,Guansheng Xing,Shanxiao Lin,Yurou Yan,Quan Zhou,Jianmei Chen,Wenjuan Zhu,Bing Chen,Shujuan Liu,Qiang Zhao
Halide perovskites hold great potential in developing next-generation X-ray detectors. However, preparing high-quality and thick perovskite films in a way compatible with a thin-film transistor (TFT)-integrated X-ray flat-panel detectors (XFPDs) remains challenging. Here, by engineering ink with effective printability and shape fidelity, direct ink writing (DIW) is developed as a new approach to printing a unique single-crystal-assembled perovskite (SCAP) thick film. In contrast to polycrystalline grains consisting of randomly orientated crystal domains, the SCAP is made of tightly packed crystals with well-defined crystal facets, showing 3–4 orders of magnitude lower trap density (4.48 × 10 12 cm −3 ). Consequently, the SCAP X-ray detectors offers the state-of-the-art detection performance (sensitivity-to-dark current ratio: 1.26 × 10 11 µC Gy air −1 A −1 ), a low detection limit (114.2 nGy air s −1 ), and negligible baseline drift (0.27 fA cm −1 s −1 V −1 ). Furthermore, the XFPD based on a 64 × 64 pixelated TFT array realizes high-resolution digital radiography, opening a new avenue for further development of perovskite X-ray detectors.
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PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Lili Wang,Huixian Dong,Keying Zheng,Nasha Zeng,Yinhe Duan,Xi Wang,Minghua Wu
Future developments in the printing and dyeing industry will involve greenisation and personalisation. Less/no water digital technology has drawn much attention over traditional printing and dyeing for reducing carbon and emissions. Based on the solubility parameter difference between disperse dyes and monomers, divinyl polysiloxane modified polyacrylate (PSMA) with the directional migration effect for disperse dyes was prepared herein via mini-emulsion polymerisation. PSMA was used as wash-free polymer additive in the digital jet dyeing of polyester fabrics with disperse dyes, which yielded wash-free dyed fabrics with high color yield and color fastness. The results showed that PSMA achieved the optimum overall performance at a molar ratio of octamethylcyclotetrasiloxane to 1,3-divinyltetramethyldisiloxane 44:1 and divinyl polysiloxane dosage of 4 wt%. PSMA had the best tensile properties, good flexibility, certain hydrophobicity and high directional migration of disperse dyes. When the PSMA dosage was 9 wt% in the wash-free ink, the front and back color yield of the wash-free dyed fabric were 18.23 and 13.56, respectively. Compared with the fabric dyed with pure liquid disperse red, the front color yield of the wash-free dyed fabric increased by about 35.2 % and the back color yield had a little change. Its color fastness to dry/wet rubbing were improved from grade 3 to 4 and from grade 2–3 to 3, respectively. The handle of the wash-free dyed fabric basically maintained the level of original fabric.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Ya Chu,Fei Zhao,Fanpeng Meng,Weiqiang Zhang,Jinsheng Zhao,Xiujuan Zhong
Donor-acceptor conjugated polymers have received significant attention as the most promising photocatalysts for efficient photocatalytic hydrogen production (PHP). Nonetheless, achieving high photocatalytic PHP performance relies on molecular framework design and the judicious selection of different structural units. Herein, benzotrithiophene (BTT) and triazine derivatives were used as the basic units of organic polymers , and two conjugated porous polymers (CPPs) named as CP1 and CP2 were successfully synthesized by Stille coupling reaction . Compared with benzene as the linkage unit of triazine, it is evident that the incorporation of the thiophene unit in CP2 broadens its light response range, and promotes the generation of electrons/holes induced by light. Density functional theory (DFT) calculations and femtosecond transient absorption(fs-TA) spectroscopy reveal that CP2 effectively inhibits the photogenerated electron-hole pair recombination and promotes carrier transport. Remarkably, CP2 with Pt co-catalyst exhibited a notably superior PHP performance compared with that of CP1 polymer, which achieved an impressive hydrogen evolution rate (HER) of 21702.4 μmol/g/h, surpassing CP1 by approximately 3.7 times. This work provides a new tactic for enhancing the intrinsic PHP activity and reveals the underlying mechanism for the enhanced photocatalytic activity by regulating the different structural units of the donor-acceptor conjugated polymers .
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Science China-Chemistry
·
2024
·
IF 10.4
Qiang Yue,Cao Huaiman,Pan Yuzhen,Chi Yi,Zhao Liangyu,Yang Yingguo,Li Hai-Bei,Gao Yan,Sun Licheng,Yu Ze
Metal phthalocyanines (MPcs) have gained considerable research attention as hole-transport materials (HTMs) in perovskite solar cells (PSCs) because of their superb stability. However, the photovoltaic performance of MPc-based HTMs in PSCs is still lagging behind their small molecule and polymeric counterparts, largely due to their relatively low hole mobility. Here, we report for the first time the application of a copper naphthalocyanine derivative (namely t Bu-CuNc) as a hole-transport material (HTM) in perovskite solar cells (PSCs), and systematically study its optoelectronic and photovoltaic property compared with its CuPc analog (tBu-CuPc). Combined experiments disclose that the extension of π -conjugation from Pc to Nc core leads to not only an enhanced hole-carrier mobility associated with a stronger intermolecular interaction, but also an elevated glass transition temperature ( T g ) of 252 °C. The resultant PSCs employing t Bu-CuNc deliver an excellent power conversion efficiency of 24.03%, which is the record efficiency reported for metal complex-based HTMs in PSCs. More importantly, the encapsulated t Bu-CuNc-based devices also show dramatically improved thermal stability than the devices using the well-known Spiro-OMeTAD, with a T 80 lifetime for more than 1,000 h under damp-heat stress. This study unfolds a new avenue for developing efficient and stable HTMs in PSCs.
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Light-Science & Applications
·
2024
·Vol. 13
·期 1
·1-15
·
IF 20.6
Chen Xiao,Shu Xiaoxuan,Zhou Jiacheng,Wan Lei,Xiao Peng,Fu Yuchen,Ye Junzhi,Huang Yi-Teng,Yan Bin,Xue Dingjiang,Chen Tao,Chen Jiejie,Hoye Robert L. Z.,Zhou Ru
Indoor photovoltaics (IPVs) have attracted increasing attention for sustainably powering Internet of Things (IoT) electronics. Sb 2 S 3 is a promising IPV candidate material with a bandgap of ~1.75 eV, which is near the optimal value for indoor energy harvesting. However, the performance of Sb 2 S 3 solar cells is limited by nonradiative recombination, which is dependent on the quality of the absorber films. Additive engineering is an effective strategy to fine tune the properties of solution-processed films. This work shows that the addition of monoethanolamine (MEA) into the precursor solution allows the nucleation and growth of Sb 2 S 3 films to be controlled, enabling the deposition of high-quality Sb 2 S 3 absorbers with reduced grain boundary density, optimized band positions, and increased carrier concentration. Complemented with computations, it is revealed that the incorporation of MEA leads to a more efficient and energetically favorable deposition for enhanced heterogeneous nucleation on the substrate, which increases the grain size and accelerates the deposition rate of Sb 2 S 3 films. Due to suppressed carrier recombination and improved charge-carrier transport in Sb 2 S 3 absorber films, the MEA-modulated Sb 2 S 3 solar cell yields a power conversion efficiency (PCE) of 7.22% under AM1.5 G illumination, and an IPV PCE of 17.55% under 1000 lux white light emitting diode (WLED) illumination, which is the highest yet reported for Sb 2 S 3 IPVs. Furthermore, we construct high performance large-area Sb 2 S 3 IPV minimodules to power IoT wireless sensors, and realize the long-term continuous recording of environmental parameters under WLED illumination in an office. This work highlights the great prospect of Sb 2 S 3 photovoltaics for indoor energy harvesting.
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JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Jinyong Ren,Jiaxin Guo,Xinyue Luo,Xinyi Dai,Guowei Zhang,Ping Ping,Depeng Kong
Lithium-ion battery (LIB) separators act an essential role on maintaining electrochemical properties and safety, while polyolefin-based separators exhibit poor thermal stability, resulting in potential safety concerns. In this work, based on 4-aminopyridine (4-AP) and hexachlorocyclotriphosphazene (HCCP), cellulose-based separator modified by HCCP cross-linked 4-AP, named CBS@H-AP, is fabricated to improve the safety and electrochemical stability of LIB. CBS@H-AP is synthesized through the crosslinking reaction of H-AP on the cellulose surface. CBS@H-AP demonstrates low flammability (self-extinguishing) and high thermal-dimensional stability (no apparent heat shrinkage at 240 °C for 5 min). Furthermore, CBS@H-AP discloses high porosity (68.4 %) and wettability (a contact angle of electrolyte of 15.1°). LIB utilizing CBS@H-AP separator unfolds excellent cycle stability, maintaining a capacity retention of 97.2 % and an average coulombic efficiency of 99.2 % at 0.5C over 100 cycles. This work opens up new possibilities for the application of cellulose-based separators in enhancing the safety and cycle stability of LIBs.
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危险品化学品经营许可证（带存储）