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学者姓名：陈善慈
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Abstract ：
Harnessing supramolecular interactions to regulate the structure and performance of functional materials is a key challenge in materials chemistry. Herein, the study utilizes 18-crown-6 (18C6) ether-assisted alkali-metal (Na, K, Cs) copper(I) iodide supramolecular assemblies to precisely regulate the material structures. This approach facilitated the transition from 1D mono-royal crown coordination (18C6@KCuI2, CKCI) to 0D di-royal crown ((18C6)(2)@Na-2(H2O)(3)Cu4I6, CNCI) and tri-royal crown ((18C6)(3)@Cs2Cu2I4, CCCI) structures. Interestingly, the CCCI single-crystal exhibits outstanding scintillation properties, with a high relative light yield of 71 000 photons MeV-1 and an ultralow detection limit of 39.3 nGy s(-1), which can be attributed to the synergistic effects of 18C6 and copper-iodide clusters. It stabilizes the self-trapped exciton state, enhances exciton localization, and reduces non-radiative losses, thus resulting in a large Stokes shift of 193 nm and near-unity photoluminescence quantum yield of 99.4%. Additionally, 18C6 can promote crystal nucleation and growth, making it easy to prepare centimeter-scale transparent single crystals with >80% transmittance, such as CCCI single crystal can achieve an ultrahigh-resolution X-ray imaging of 26.3 lp mm(-1). It demonstrates that the structure and performance of halide scintillators can be regulated through supramolecular interactions, which provides a new approach for developing high-performance scintillator materials.
Keyword ：
18-crown-6 18-crown-6 copper(I) iodide copper(I) iodide self-trapped exciton state self-trapped exciton state supramolecular scintillators supramolecular scintillators X-ray imaging X-ray imaging
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| GB/T 7714 | Ye, Yuanji , Di, Yiming , Zhou, Jiahao et al. Crown Ether-Assisted Alkali-Metal Copper(I) Iodide Supramolecular Scintillators with Near-Unity Emission for Ultrahigh-Resolution X-Ray Imaging [J]. | ADVANCED FUNCTIONAL MATERIALS , 2025 . |
| MLA | Ye, Yuanji et al. "Crown Ether-Assisted Alkali-Metal Copper(I) Iodide Supramolecular Scintillators with Near-Unity Emission for Ultrahigh-Resolution X-Ray Imaging" . | ADVANCED FUNCTIONAL MATERIALS (2025) . |
| APA | Ye, Yuanji , Di, Yiming , Zhou, Jiahao , Qiu, Qiangwen , Chen, Yuhua , Zhong, Shanyuan et al. Crown Ether-Assisted Alkali-Metal Copper(I) Iodide Supramolecular Scintillators with Near-Unity Emission for Ultrahigh-Resolution X-Ray Imaging . | ADVANCED FUNCTIONAL MATERIALS , 2025 . |
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Abstract ：
In recent years, metal halide perovskites have garnered significant attention in the field of X-ray detection due to their outstanding photoelectric properties, high X-ray attenuation coefficients, and the advantage of being able to be fabricated by low-cost solution processing methods. However, a major challenge in developing perovskite X-ray detectors lies in the low quality of films produced through solution processing. In this work, we introduce an efficient method that employs a straightforward blade-coating technique to successfully prepare MAPbI3 perovskite films with a thickness of tens of microns under ambient conditions. To further improve the quality of the MAPbI3 films, we incorporate the polymer polyvinylpyrrolidone (PVP) into the perovskite precursor solution. The addition of PVP promotes crystal growth, resulting in an enlarged grain size and a more uniform arrangement within the perovskite film. This enhancement leads to a reduction in defect density and subsequent improvement in the charge collection efficiency. Consequently, the detector manufactured using the PVP-optimized film exhibits an enhanced X-ray sensitivity of 2.6 x 103 mu C Gyair-1 cm-2 and achieves a low detection limit of 11 nGyair s-1 under 10 keV X-ray energy, surpassing those achieved with the original perovskite film which measured 0.60 x 103 mu C Gyair-1 cm-2 and 139 nGyair s-1 under the same conditions. This work unlocks new prospects for the straightforward and cost-effective manufacture of high-performance X-ray detectors.
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| GB/T 7714 | Hua, Yanlong , Chen, Jiahui , Guo, Cuiling et al. Polyvinylpyrrolidone-enhanced perovskite films for efficient direct X-ray detection [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2025 , 13 (18) : 9365-9373 . |
| MLA | Hua, Yanlong et al. "Polyvinylpyrrolidone-enhanced perovskite films for efficient direct X-ray detection" . | JOURNAL OF MATERIALS CHEMISTRY C 13 . 18 (2025) : 9365-9373 . |
| APA | Hua, Yanlong , Chen, Jiahui , Guo, Cuiling , Chen, Shan-Ci , He, Yu , Yang, Huanghao . Polyvinylpyrrolidone-enhanced perovskite films for efficient direct X-ray detection . | JOURNAL OF MATERIALS CHEMISTRY C , 2025 , 13 (18) , 9365-9373 . |
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Mn-based metal halides scintillators with high photoluminescence quantum yield (PLQY) have recently emerged as promising large-size candidates for X-ray imaging but still remains as difficult challenge in stability and high processing temperatures. Here, three manganese halides are designed by introducing branched chains into organic cations and extending the carbon chains, namely (i-PrTPP)2MnBr4, (i-BuTPP)2MnBr4 and (i-AmTPP)2MnBr4, successfully lowered the melting point of manganese halides to 120.2 degrees C. Three materials show striking light yields of 59 000, 40 000, and 52 000 photons MeV-1, respectively. The lowest detection limits are 42.30, 50.92, and 45.71 nGy s-1, respectively. Meanwhile, compared to their counterparts with linear carbon chains, the introduction of branched chains has significantly enhanced the stability of the scintillators in the glass state. A transparent glass has been prepared using a melt-quenching method, which exhibited 80% transmittance at 400-700 nm. The glass is utilized for X-ray imaging, achieving a high spatial resolution up to 46.6 lp mm-1. This result provides a new approach to enhancing the performance of such scintillator materials.
Keyword ：
glass scintillator glass scintillator low temperature melting low temperature melting metal halide metal halide stability stability X-ray detection X-ray detection
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| GB/T 7714 | Chen, Shichuan , Guo, Cuiling , Chen, Shan-Ci et al. Enhanced Stability of Melt-Processable Organic-Inorganic Hybrid Manganese Halides for X-Ray Imaging [J]. | SMALL , 2024 , 20 (52) . |
| MLA | Chen, Shichuan et al. "Enhanced Stability of Melt-Processable Organic-Inorganic Hybrid Manganese Halides for X-Ray Imaging" . | SMALL 20 . 52 (2024) . |
| APA | Chen, Shichuan , Guo, Cuiling , Chen, Shan-Ci , Di, Yiming , Fang, Xin , Lin, Mei-Jin et al. Enhanced Stability of Melt-Processable Organic-Inorganic Hybrid Manganese Halides for X-Ray Imaging . | SMALL , 2024 , 20 (52) . |
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X-ray imaging utilizing organic-inorganic hybrid metal halide (OIHMH) glassy scintillators has garnered significant attention. But their inferior radioluminescence makes achieving rapid image acquisition difficult, posing a persistent challenge for dynamic imaging. Herein, organic phosphonium halide side-chain engineering is proposed, introducing bulky aromatic rings at the alkyl chain ends, to improve the radioluminescence of OIHMHs. For Mn(II)-based OIHMHs, the (BUP)2MnCl4 (BUP = butyltriphenylphosphonium) powder has a low relative light yield (5400 photons MeV-1). After introducing a benzyl group, this value of (BnO-MTP)2MnCl4 (BnO-MTP = (benzyloxy)methyl) triphenylphonium) powder boosts to 60 000 photons MeV-1. The introduction of benzyl group can restrict molecular non-radiative vibrations, increase exciton binding energy, enhance electron-phonon coupling, and reduce self-absorption, thus significantly improving exciton utilization and scintillation performance of (BnO-MTP)2MnCl4. Besides, the transparent (BnO-MTP)2MnCl4 glass has a low melting point (167 degrees C) and high relative light yield (26 000 photons MeV-1). When applied to X-ray imaging, it can achieve static imaging with a spatial-resolution of up to 24.6 lp mm-1 and clear dynamic imaging under X-ray irradiation. Furthermore, this strategy also applies to Sb(III)-based OIHMHs with self-trapped exciton emissions, where (BnO-MTP)2SbCl5 exhibits superior scintillation performance compared to (BUP)2SbCl5, demonstrating its broad applicability in constructing high-performance OIHMH glassy scintillators.
Keyword ：
glassy scintillators glassy scintillators organic-inorganic hybrid metal halide organic-inorganic hybrid metal halide organic phosphonium halides organic phosphonium halides side-chain engineering side-chain engineering X-ray imaging X-ray imaging
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| GB/T 7714 | Qiu, Qiangwen , Zhang, Guozhen , Chen, Jingru et al. Organic Phosphonium Side-Chain Engineering in Metal Halide Glassy Scintillators for Enhanced X-Ray Dynamic Imaging [J]. | SMALL , 2024 . |
| MLA | Qiu, Qiangwen et al. "Organic Phosphonium Side-Chain Engineering in Metal Halide Glassy Scintillators for Enhanced X-Ray Dynamic Imaging" . | SMALL (2024) . |
| APA | Qiu, Qiangwen , Zhang, Guozhen , Chen, Jingru , Di, Yiming , Wu, Liang , Chen, Hongming et al. Organic Phosphonium Side-Chain Engineering in Metal Halide Glassy Scintillators for Enhanced X-Ray Dynamic Imaging . | SMALL , 2024 . |
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Surface defects induce non-radiative charge recombination and reduce the photovoltaic performance of perovskite solar cells (PSCs). To realize highly efficient and stable PSCs, surface passivation is an effective strategy to reduce defects in mixed halide perovskite films. Organic iodides have emerged as valuable candidates for perovskite surface passivation owing to their facile preparation, optimal lattice matching with perovskites, and robust defect passivation capability. Here, a novel phthalimide N-alkylammonium iodide (PAE-I) is introduced as a passivating agent for the defects on the surface of FAPbI(3) perovskite films. The incorporated PAE-I layer effectively passivates interface traps and reduces non-radiative recombination, improving carrier extraction and transfer. As a result, the power conversion efficiency (PCE) of PSCs increases from 19.76% to 21.30%. Furthermore, the PAE-I-passivated PSCs without encapsulation exhibit excellent long-term stability, retaining 80% of the initial efficiency after 2400 hours under an ambient atmosphere. This work provides deep insights into the reduction of non-radiative recombination and the enhancement of device performance through the application of phthalimide as a superior and promising passivator.
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| GB/T 7714 | Wang, Yao , Chen, Shan-Ci , Tai, Shuya et al. Improving the performance and stability of perovskite solar cells via surface passivation of phthalimide N-alkylammonium iodides [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2024 , 12 (18) : 6540-6547 . |
| MLA | Wang, Yao et al. "Improving the performance and stability of perovskite solar cells via surface passivation of phthalimide N-alkylammonium iodides" . | JOURNAL OF MATERIALS CHEMISTRY C 12 . 18 (2024) : 6540-6547 . |
| APA | Wang, Yao , Chen, Shan-Ci , Tai, Shuya , Wang, Di , Ma, Yunlong , Wu, Jishan et al. Improving the performance and stability of perovskite solar cells via surface passivation of phthalimide N-alkylammonium iodides . | JOURNAL OF MATERIALS CHEMISTRY C , 2024 , 12 (18) , 6540-6547 . |
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Side-chain fluorination of nonfullerene acceptors (NFAs) has been rarely reported to enhance their photovoltaic performance, although it may improve their backbone organization and carrier mobilities. Here, we design new partially fluorinated side chains and incorporate them into M-series NFAs, which are featured with a ladder-type heteroheptacene-cored skeleton without sp 3-hybrid- ized carbons. Compared with the traditional M-series acceptor with non-fluorinated side chains (MC7F0), the NFA with partially fluorinated side chains (MC7F3) shows down-shifted energy levels, reduced miscibility, and more importantly, improved backbone ganization, thereby leading to the formation of a 3D network packing structure with enhanced carrier transport. Consequently, MC7F3-based device exhibits a power conversion efficiency 17.61% and an excellent fill factor of 79.48%, both of which among the best values for all A-D-A-type NFAs reported so The results highlight that side-chain fluorination can efficiently enhance p-conjugated backbone organization, improve intermolecular interaction, increase electron mobilities, and boost photovoltaic performance of NFAs.
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| GB/T 7714 | Cai, Dongdong , Ma, Yunlong , Xing, Kaichen et al. Enhancing backbone organization and photovoltaic performance of M-series acceptors by using partially fluorinated side chains [J]. | CHEM , 2024 , 10 (10) . |
| MLA | Cai, Dongdong et al. "Enhancing backbone organization and photovoltaic performance of M-series acceptors by using partially fluorinated side chains" . | CHEM 10 . 10 (2024) . |
| APA | Cai, Dongdong , Ma, Yunlong , Xing, Kaichen , Wang, Jin-Yun , Luan, Shaoxin , Tang, Changquan et al. Enhancing backbone organization and photovoltaic performance of M-series acceptors by using partially fluorinated side chains . | CHEM , 2024 , 10 (10) . |
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2D perovskites have recently emerged as promising materials for solar cells due to their appealing ambient stability and structural diversity. The organic spacer cation plays an important role in the stability and properties of the 2D perovskites. Herein, a new organic ammonium cation, 2-furfurylammonium (FuMA(+)), is developed as the spacer cation for 2D Ruddlesden-Popper perovskites. Thin films of (FuMA)(2)(MA)(4)Pb5I16 with increased crystal size and enhanced vertical orientation are obtained via an additive-assisted film forming technique, which dramatically improves the efficiency of 2D perovskite solar cells from 4.90% to 15.66%. Moreover, the perovskite films based on FuMA can be prepared in ambient air, and the devices based on the perovskite films prepared in ambient air with 30% relative humidity can perform a power conversion efficiency (PCE) of 15.24%.
Keyword ：
2D perovskites 2D perovskites ambient processing ambient processing energy conversion energy conversion furan furan photovoltaic photovoltaic
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| GB/T 7714 | Zheng, Yi , Chen, Shan-Ci , Ma, Yunlong et al. Furfurylammonium as a Spacer for Efficient 2D Ruddlesden-Popper Perovskite Solar Cells [J]. | SOLAR RRL , 2022 , 6 (8) . |
| MLA | Zheng, Yi et al. "Furfurylammonium as a Spacer for Efficient 2D Ruddlesden-Popper Perovskite Solar Cells" . | SOLAR RRL 6 . 8 (2022) . |
| APA | Zheng, Yi , Chen, Shan-Ci , Ma, Yunlong , Zheng, Qingdong . Furfurylammonium as a Spacer for Efficient 2D Ruddlesden-Popper Perovskite Solar Cells . | SOLAR RRL , 2022 , 6 (8) . |
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