CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Lina Hu,Chenxi Zhang,Yukun Wu,Shiqi Li,Fan Zhang,Jingkun Ren,Yang Hao,Qinjun Sun,Yulin Wang,Yuying Hao
The stability of perovskite solar cells (PSCs) is a major problem limiting their application. Here, we proposed a feasible solution using bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate (HALS-770) as top protection layer of perovskite. HALS-770 interlayer can not only improve the antioxidant ability of perovskite by removing superoxide (O 2 ·- ) with help of hindered amine groups, but also suppress the internal and external degradation path of perovskite due to the co-existence of hydrophilic and hydrophobic groups. Moreover, it can block volatilization of organic cation and the migration of Ag + and I - , thus improve thermal stability of perovskite and alleviate destruction of Ag electrode. In addition, the heterocycles N atom and carbonyl group in HALS-770 interact with the under-coordinated Pb 2+ , reducing the interface defects. As a result, the unencapsulated device maintains excellent stability over 95 % of its initial efficiency after 30 days in ambient condition with about 25–50 % humidity, and possesses remarkable continuous operation stability with projected T80 > 1400 h at maximum power point tracking in glove box, much higher than those of the pristine device. Meanwhile, HALS-770 enable the PCE of 21.88 % for PSC (0.06 cm 2 ), which is among the highest efficiencies for MAPbI 3 based PSCs with p-i-n structure, and the PCE of 19.07 % for PSM (4 cm 2 ). And it is also suitable for FAMA-based devices with n-i-p structure, enabling an efficiency of 23.03 % (0.06 cm 2 ) and excellent stability.
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高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Xuyang Liu,Chao Shi,Dongxu Guang,Lijuan Yao,Bobo Li,Xuan Fang,Mingxia Qiu,Dan Wu,Peigang Han
Metal halide perovskites have triggered numerous studies in the application of optoelectronic devices. In this work, we incorporated Ce3+ ions into the MAPbBr3 perovskite to extend the photoluminescence spectrum from the green light region to red light region, which can be attributed to the dopant-induced self-trapped exciton (STE) emission. Furthermore, the non-equivalent substitution of Ce3+ ions for the Pb2+ ions can result in extra electrons, thus can change the type of dominant carriers and improve the carrier mobility. The MAPbBr3:Ce based photodetector exhibited a broadband photodetection capability over a wide range from 340 nm to 650 nm. In addition, after doping Ce3+ ions, the maximum device responsivity, detectivity and external quantum efficiency were efficiently improved. These results provide a new approach to highly-efficient and broadband-detecting photoconductive photodetectors.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hao Xu,Xingting Liu,Shanlei Xu,Kin-Long Wong,Xinjie Zhou,Huilong Chen,Yijin Lin,Renyong Geng,Weiguo Zhu,Jun Yin,Xin Song
Moderate charge transporting capacity together with inexpedient energetic level alignment of the self-assembled molecules (SAMs) initiate severely interfacial non-radiative recombination in organic solar cells (OSCs), which significantly hinder the performance and robustness of corresponding devices. Herein, a molecular isomerization strategy is developed to construct promising SAM for efficient and reliable OSC devices, where chlorine atoms are grafted on either para- (pCl-ph) or meta- (mCl-ph) location in benzene sidechain substituted carbazole terminal group. In comparison with para location, we found the meta -Cl substation can instigate the intermolecular interaction and further boost molecular packing, which is beneficial to strengthen the carrier conductivity and ameliorate the trap density. Furthermore, the optimal work function tunability of mCl-ph trigger the favorable energy-level layout, whereas over deep-lying level arrangement of pCl-ph induced the circumferential charge accumulation and further catalyze the insufferable non-radiative recombination loss. Consequently, the champion power conversion efficiency (PCE) is upgraded from 16.1 % (pCl-ph) to 19.6 % (mCl-ph) with superior generality in diverse blend system. More strikingly, the raised operation stability (T80:575 h) is harvested in mCl-ph devices (pCl-ph devices T80:111 h), demonstrating that SAM isomerization is an appealing approach for OSCs with high efficiency and stability simultaneously.
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Nanoscale
·
2024
·Vol. 16
·期 18
·8931-8940
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IF 5.8
Rusong Sang,Yezi Hu,Zewen Shen,Guixia Zhao,Junrong Yue,Xiubing Huang
In light of the widespread use of fossil fuels and the resulting environmental pollution, it is crucial to develop efficient photocatalysts for renewable energy applications that utilize visible light. Organic photocatalysts based on β-ketoenamine offer several advantages, including facile preparation, high stability, structural controllability, and excellent photovoltaic properties. However, in previous studies, the synthesis of porous organic polymers (POPs) often involved long, high-temperature processes. In this study, POPs with donor (D)–acceptor (A) structure were constructed by utilizing various branched bridging groups and 2,4,6-triformylphloroglucinol, across multiple temperature gradients. Through adjustments in hydrothermal temperature, we successfully synthesized a series of POPs with varying enol–keto structure ratios. Among these POPs, the dimethoxybenzidine-POPs (DMDPOPs) with methoxy electron-rich branched chains exhibited superior photovoltaic performance, electron transfer rate, and photocatalytic activity compared to the dihydroxybenzidine-POPs (DHDPOPs) with electron-deficient hydroxyl branched chains. Notably, DMDPOP-30 demonstrated outstanding performance, achieving a conversion rate of 98% within 3 h. Additionally, other POPs exhibited favorable conversions (90%), further confirming the feasibility of this synthetic approach. Moreover, the synthesis of DMDPOP-30 was achieved under mild conditions at room temperature, highlighting its significant potential for practical applications.
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PubMed
高影响因子
OPTICAL MATERIALS
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2024
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IF 3.8
Dengkun Chen,Yusha Xie,Tao Chen,Tao Zhang,Yaosong Huang,Xiaoyan Qiu
Solution-processed NiO film is widely applied as the hole transport layer (HTL) of metal halide perovskite solar cells (PSCs). In general, a process temperature over 300 °C is necessary to improve the nucleation and crystallization of NiO grains. This temperature is higher than the glass transition temperature of most low-cost flexible substrates . In this paper, NiO nanoparticle water solution was prepared to spin-coat NiO films at a treatment temperature of 100 °C. The solar cell with the invert planar structure of ITO/NiO/CH 3 NH 3 PbI 3 /ZnO/Ag presented a power conversion efficiency of 11.24 %, which is comparable with that of similar CH 3 NH 3 PbI 3 solar cells with the NiO HTLs prepared at the high temperature. The water-processed NiO HTL greatly decreases the process temperature and simplifies the preparation process of PSCs, showing promising applications in low-cost flexible PSCs.
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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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Materials Today Physics
·
2024
·
IF 10
Yongjian Chen,Cheng Yan,Zhenyu Chen,Xiankan Zeng,Qungui Wang,Shiyu Yang,Lunyao Pan,Chenglong Li,Maolin Mu,Wen Li,Guanqi Tang,Weiqing Yang
Unbalanced electron-hole injection in perovskite light-emitting diodes (PeLEDs) has always been a major stumbling block limiting device performance. Here we develop a heterointerface Coulomb enhancement strategy to efficiently promote electron injection between perovskite emitter and transport layer and thereby balance the electron-hole recombination equilibrium through manipulating defect-rich positive-charge centers induced Coulomb interactions in LiF interlayer. Through multiscale polarization response characterizations combined with capacitance-voltage and electrochemical impedance spectroscopy, it is confirmed that diffusing holes trapped in LiF layer leads to the increased interfacial polarization. Moreover, the polarization response reversal and high-frequency-dependent dissipation sensitivity further corroborate the LiF-induced interfacial Coulomb enhancement mechanism. The universality of the concept is also successfully verified in devices with electron-only, hole-only, and PN structures. Consequently, the modified PeLEDs show a lower leakage current, along with a significant performance improvement by 1.9 times in external quantum efficiency (18.8%) and 5.7 times in luminance compared with control samples. This study provides a unique perspective to promote carrier transport balance by taking advantage of physical effects within interlayer.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Kexin Li,Bin He,Ruirui Wang,Ruiyi Yan,Ruirui Zhang,Ruixia Liu
The selective oxidation reaction of cyclohexane is one of the typical activated sp 3 C-H reactions, and its product adipic acid (AA) is the indispensable raw material used to produce nylon. However, subjecting to the inertness of C-H bond and the great reactivity of AA, the targeted transformation of cyclohexane remains a challenge. Here, the interfacial hydrogen bond (IHD) was developed by anchoring CeO 2 on graphite carbon nitride (g-C 3 N 4 ) surface, which could boost targeted acquisition adipic acid from aerobic oxidation of cyclohexane. The results indicated that the IHD effect can be flexibly regulated by changing the ratio of Ce 3+ /Ce 4+ , further optimizing the properties of surface OH species and Lewis acid sites. Under the synergistic effect of Ce 3+ /Ce 4+ and Lewis acid sites on reaction interface, the glorious performance (32.2% conversion of cyclohexane with 66.4% selectivity) was obtained over the as-prepared CeO 2 /g-C 3 N 4 IHD system. In addition, the interfacial adsorption properties of cyclohexane were explored by the virtue of in situ infrared spectroscopy, revealing the IHD effect could tune the adsorption behavior of cyclohexanone and further improve the selectivity of AA. This work disclosed that engineering the interface hydrogen bond effect between CeO 2 and g-C 3 N 4 provided feasible strategies to obtain excellent catalyst for cyclohexane oxidation.
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CRYSTENGCOMM
·
2025
·
IF 2.6
Xudong Fan,Huibo Zhang,Kang Li,Zhongxin Dong,Jie Huang,Feng Teng,Haibo Fan,Hui Jiang,Xuexia He,Peng Hu
Organic molecules have attracted much attention for lithium-ion batteries due to the flexibility, adjustable performance through molecular design, and low cost. However, the high solubility in electrolytes and low conductivity hindered their utilization in battery applications. In this work, four organic charge transfer cocrystals are synthesized by using p-fluoranil (FA) as the acceptor molecule and pyrene, benz[a]anthracene (BAA), chrysene and perylene as the donor molecules. The resulting cocrystals demonstrated superior specific capacity and cycling stability compared to its monomer counterparts. Specifically, the pyrene-FA cocrystal exhibited the highest reversible capacity of 206 mAh g-1 after 300 cycles at a current density of 0.1 A g-1, and maintained excellent cycling stability over 420 cycles. Even at a high current density of 1 A g-1, the pyrene-FA cocrystal displayed the highest reversible capacity of 250 mAh g-1 and remarkable cycling stability over 4500 cycles. The good high specific capacity and cycling stability attributed to the one-dimensional columnar structure and low solubility in the electrolyte of cocrystals. This study indicates that charge transfer can effectively improve the specific capacity and cycling stability of organic small molecules-based Li-ion battery.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Chenyang Shi,Ningxia Gu,Zeyuan Sun,Jie Xiong,Pingfan Du,Lixin Song
Simplified structure perovskite solar cells (PSCs) without typical charge transport layer (CTL) have attracted much attention because of their simple manufacturing, low production costs, great stability, and high power conversion efficiency. However, it still has lots of challenges, such as poor interface contact and mismatched energy level, which limits the electron transfer and extraction as well as the photovoltaic performance of the device. In this work, a bifunctional monolayer 3-Chloropropyltriethoxysilane is self-assembled on FTO and applied in electron transport layer (ETL)-free PSCs. A dipole layer was developed, which could bend the band at the FTO/perovskite interface, improve interface contact, enhance the carrier transfer, and inhibit the charges recombination. The chloridion of silane forms halogen bonds with the uncoordinated Pb 2+ ions of the perovskite, thereby passivating the defects of the perovskite films and improving the quality of perovskite films. Eventually, the ETL-free with 3-CPTES SAM PSCs achieves a 21 % efficiency, which has increased by 40 % compared to 14.93 % of the pristine device. Concurrently, the perovskite solar cell (PSC) based on the modified FTO demonstrates notable stability improvements under various environmental and extreme conditions. Specifically, the PSC maintains 79.7 % PCE under high temperature conditions, 77.8 % under high humidity conditions, and an impressive 62.6 % under illumination.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Kaiyu Yang,Baolin Xu,Qiuxiang Lin,Yongshen Yu,Hailong Hu,Fushan Li
Perovskite light-emitting diodes (PeLEDs) have attracted wide attention due to their excellent photoelectric properties. A variety of additives have been studied for perovskite emission layers to enhance the performance of PeLEDs. However, the buried interface, which also has significant influence on the crystallization kinetics and exciton recombination dynamics of the perovskite emission layer, remains to be explored. In this work, we introduced a new ionic liquid 1-Ethyl-3-methylimidazolium dicyanamide (EMIM DCA) with the characteristics of low viscosity and high conductivity into the interfacial layer between the hole transport layer (HTL) and the perovskite film. Due to the strong interaction between the EMIM DCA and perovskite, the crystallization of the perovskite film is obviously improved and the defects at the interface are well passivated. As a result, the nonradiative recombination in the interlayer is significantly reduced. In addition, the introduction of EMIM DCA promoted the injection of charge carriers, thus achieving a high luminance of 32310 cd m −2 and enabling the maximum external quantum efficiency (EQE) of the PeLEDs increased from 10.2 % to 18.7 %.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Bin Liu,Junhan Guo,Yang Tang,Liang Qin,Zhidong Lou,Yufeng Hu,Feng Teng,Yanbing Hou
Micro–nano organic–inorganic hybrid lead halide perovskites have become some of the most promising materials for optoelectronic applications due to their excellent photoelectric properties. The micro–nano scale laser device made using these materials would be an ideal light source for integrated photonics. The preparation methods of perovskite crystals grown via solution processing have improved a lot, but it is difficult to prepare discrete Fabry–Pérot (F–P) mode optical resonators with high-quality factor and small volume on the substrates due to random nucleation and excessive nucleation points. Hence, we used silver nanowires to induce the crystallization of perovskite crystallites, forming a perovskite/silver coupling structure and achieving an efficient laser. The directional distribution matrix of perovskite crystallites was obtained by adjusting the directional distribution of silver nanowires by using a controllable pulling method. By adjusting the concentration of the perovskite precursor solution, the aspect ratio of the crystallized perovskite microcrystals can be regulated, thus achieving the resonance modes of different perovskite microcavities. The results would open up an alternative approach to achieve controllable growth of perovskite crystallites.
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