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二维RP钙钛矿纳米片的合成及荧光性能研究
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作者 汤新梅 《青年创新创业研究》 2021年第1期42-50,共9页
在光电领域,二维Ruddlesden-Popper(2D-RP)钙钛矿的光电性能及稳定性对光电器件的性能提高及其重要。尤其二维RP钙钛矿纳米片的过渡,因为这将揭示量子限制主导的光物理性质。此外,我们成功地将单个2D-RP钙钛矿纳米片制作成微型光电探测... 在光电领域,二维Ruddlesden-Popper(2D-RP)钙钛矿的光电性能及稳定性对光电器件的性能提高及其重要。尤其二维RP钙钛矿纳米片的过渡,因为这将揭示量子限制主导的光物理性质。此外,我们成功地将单个2D-RP钙钛矿纳米片制作成微型光电探测器,并显示出优异的光电性能。在此,我们将重点介绍2D-RP钙钛矿纳米片的可控合成、光学性能的最新进展,并讨论和比较不同量子阱层厚度的二维钙钛矿型纳米片的荧光特性。 展开更多
关键词 钙钛矿纳米片 Ruddlesden-Popper(RP) 合成 光学性质 荧光特性
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二维钙钛矿纳米片及其器件的光电特性探讨
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作者 汤新梅 《青年创新创业研究》 2021年第2期53-59,共7页
在光电领域,二维Ruddlesden-Popper(2D-RP)钙钛矿及其光电器件的光电性能非常重要。文中,我们重点介绍了2D-RP钙钛矿的激子性质、非线性光学特性,探讨了将2D-RP钙钛矿制备成光电器件后的光学特性,并对该领域未来的发展趋势和挑战进行了... 在光电领域,二维Ruddlesden-Popper(2D-RP)钙钛矿及其光电器件的光电性能非常重要。文中,我们重点介绍了2D-RP钙钛矿的激子性质、非线性光学特性,探讨了将2D-RP钙钛矿制备成光电器件后的光学特性,并对该领域未来的发展趋势和挑战进行了阐述。 展开更多
关键词 钙钛矿纳米片 光电器件 光学特性 激子性质
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Ag纳米颗粒局域表面等离子体共振增强CsPbBr_(3)纳米片光电探测器性能研究
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作者 柳维端 穆国鑫 +4 位作者 解国奥 王亚琦 李根 胡永明 李岳彬 《湖北大学学报(自然科学版)》 CAS 2021年第5期572-576,共5页
采用热注入法,通过添加短链配体辛酸和辛胺制备金属卤化物钙钛矿CsPbBr_(3)纳米片,引入AgBr作为Ag前驱体,通过光照还原合成Ag@CsPbBr_(3)复合纳米片,组装Au/CsPbBr_(3)/Au和Au/Ag@CsPbBr_(3)/Au光电导型探测器.研究发现,探测器对520 nm... 采用热注入法,通过添加短链配体辛酸和辛胺制备金属卤化物钙钛矿CsPbBr_(3)纳米片,引入AgBr作为Ag前驱体,通过光照还原合成Ag@CsPbBr_(3)复合纳米片,组装Au/CsPbBr_(3)/Au和Au/Ag@CsPbBr_(3)/Au光电导型探测器.研究发现,探测器对520 nm可见光具有良好的探测性能,在Ag纳米颗粒局域表面等离子体共振效应的作用下,探测器响应度由198.6μA/W增至240.3μA/W,增幅达21%.该探测器在520 nm波段光电响应良好,在未来的可见光通信中具有重要的应用前景. 展开更多
关键词 光电探测器 AG纳米颗粒 钙钛矿纳米片 局域表面等离子体共振
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High Sensitivity Submicron Scale Temperature Sensor Based on Perovskite Nanoplatelet Lasers
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作者 ZHAO Ruofan TAO Jianxun +7 位作者 XI Yuying CHEN Jiangzhao JI Ting WANG Wenyan WEN Rong CUI Yanxia CHEN Junsheng LI Guohui 《发光学报》 EI CAS CSCD 北大核心 2024年第9期1511-1520,共10页
Submicron scale temperature sensors are crucial for a range of applications,particularly in micro and na-noscale environments.One promising solution involves the use of active whispering gallery mode(WGM)microresonato... Submicron scale temperature sensors are crucial for a range of applications,particularly in micro and na-noscale environments.One promising solution involves the use of active whispering gallery mode(WGM)microresonators.These resonators can be remotely excited and read out using free-space structures,simplifying the process of sensing.In this study,we present a submicron-scale temperature sensor with a remarkable sensitivity up to 185 pm/℃based on a trian-gular MAPbI3 nanoplatelet(NPL)laser.Notably,as temperature changes,the peak wavelength of the laser line shifts lin-early.This unique characteristic allows for precise temperature sensing by tracking the peak wavelength of the NPL laser.The optical modes are confined within the perovskite NPL,which measures just 85 nm in height,due to total internal reflec-tion.Our NPL laser boasts several key features,including a high Q of~2610 and a low laser threshold of about 19.8μJ·cm^(−2).The combination of exceptional sensitivity and ultra-small size makes our WGM device an ideal candidate for integration into systems that demand compact temperature sensors.This advancement paves the way for significant prog-ress in the development of ultrasmall temperature sensors,opening new possibilities across various fields. 展开更多
关键词 temperature sensor submicron scale perovskite nanoplatelet
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Unconventional solution-phase epitaxial growth of organic-inorganic hybrid perovskite nanocrystals on metal sulfide nanosheets 被引量:1
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作者 Zhipeng Zhang Fangfang Sun +11 位作者 Zhaohua Zhu Jie Dai Kai Gao Qi Wei Xiaotong Shi Qian Sun Yan Yan Hai Li Haidong Yu Guichuan Xing Xiao Huang Wei Huang 《Science China Materials》 SCIE EI CSCD 2019年第1期43-53,共11页
Epitaxial heterostructures based on organicinorganic hybrid perovskites and two-dimensional materials hold great promises in optoelectronics, but they have been prepared only via solid-state methods that restricted th... Epitaxial heterostructures based on organicinorganic hybrid perovskites and two-dimensional materials hold great promises in optoelectronics, but they have been prepared only via solid-state methods that restricted their practical applications. Herein, we report cubic-phased MAPbBr3(MA=CH3NH3+) nanocrystals were epitaxially deposited on trigonal/hexagonal-phased MoS2 nanosheets in solution by facilely tuning the solvation conditions. In spite of the mismatched lattice symmetry between the square MAPbBr3(001) overlayer and the hexagonal MoS2(001) substrate, two different aligning directions with lattice mismatch of as small as 1% were observed based on the domainmatching epitaxy. This was realized most likely due to the flexible nature and absence of surface dangling bonds of MoS2 nanosheets. The formation of the epitaxial interface affords an effective energy transfer from MAPbBr3 to MoS2, and as a result, paper-based photodetectors facilely fabricated from these solution-dispersible heterostructures showed better performance compared to those based on MoS2 or MAPbBr3 alone. In addition to the improved energy transfer and light adsorption, the use of MoS2 nanosheets provided flexible and continuous substrates to connect the otherwise discrete MAPbBr3 nanocrystals and achieved the better film forming ability. Our work suggests that the scalable preparation of heterostructures based on organic-inorganic hybrid perovskites and 2D materials via solution-phase epitaxy may bring about more opportunities for expanding their optoelectronic applications. 展开更多
关键词 organic-inorganic hybrid perovskite transition metal chalcogenide epitaxial growth paper-based photodetector
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120 mm Single-crystalline perovskite and wafers: towards viable applications 被引量:10
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作者 Yucheng Liu Xiaodong Ren +13 位作者 Jing Zhang Zhou Yang Dong Yang Fengyang Yu Jiankun Sun Changming Zhao Zhun Yao Bo Wang Qingbo Wei Fengwei Xiao Haibo Fan Hao Deng Liangping Deng Shengzhong (Frank) Liu 《Science China Chemistry》 SCIE EI CAS CSCD 2017年第10期1367-1376,共10页
As the large single-crystalline silicon wafers have revolutionized many industries including electronics and solar cells, it is envisioned that the availability of large single-crystalline perovskite crystals and wafe... As the large single-crystalline silicon wafers have revolutionized many industries including electronics and solar cells, it is envisioned that the availability of large single-crystalline perovskite crystals and wafers will revolutionize its broad applications in photovoltaics, optoelectronics, lasers, photodetectors, light emitting diodes(LEDs), etc. Here we report a method to grow large single-crystalline perovskites including single-halide crystals: CH3NH3PbX3(X=I, Br, Cl), and dual-halide ones:CH3NH3Pb(ClxBr1.x)3 and CH3NH3Pb(BrxI1.x)3, with the largest crystal being 120 mm in length. Meanwhile, we have advanced a process to slice the large perovskite crystals into thin wafers. It is found that the wafers exhibit remarkable features:(1)its trap-state density is a million times smaller than that in the microcrystalline perovskite thin films(MPTF);(2) its carrier mobility is 410 times higher than its most popular organic counterpart P3HT;(3) its optical absorption is expanded to as high as910 nm comparing to 797 nm for the MPTF;(4) while MPTF decomposes at 150 °C, the wafer is stable at high temperature up to270 °C;(5) when exposed to high humidity(75% RH), MPTF decomposes in 5 h while the wafer shows no change for overnight;(6) its photocurrent response is 250 times higher than its MPTF counterpart. A few electronic devices have been fabricated using the crystalline wafers. Among them, the Hall test gives low carrier concentration with high mobility. The trap-state density is measured much lower than common semiconductors. Moreover, the large SC-wafer is found particularly useful for mass production of integrated circuits. By adjusting the halide composition, both the optical absorption and the light emission can be fine-tuned across the entire visible spectrum from 400 nm to 800 nm. It is envisioned that a range of visible lasers and LEDs may be developed using the dual-halide perovskites. With fewer trap states, high mobility, broader absorption, and humidity resistance, it is expected that solar cells with high stable efficiency maybe attainable using the crystalline wafers. 展开更多
关键词 single-crystal growth perovskite wafer IC devices photodetector array
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