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Cesium Copper Iodide Tailored Nanoplates and Nanorods for Blue, Yellow, and White Emission
Chemistry of Materials ( IF 7.2 ) Pub Date : 2019-10-28 , DOI: 10.1021/acs.chemmater.9b03250 Parth Vashishtha 1 , Gautam V. Nutan 1 , Benjamin E. Griffith 2 , Yanan Fang 1 , David Giovanni 3 , Metikoti Jagadeeswararao 4 , Tze Chien Sum 3 , Nripan Mathews 1, 4 , Subodh G. Mhaisalkar 1, 4 , John V. Hanna 1, 2 , Tim White 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2019-10-28 , DOI: 10.1021/acs.chemmater.9b03250 Parth Vashishtha 1 , Gautam V. Nutan 1 , Benjamin E. Griffith 2 , Yanan Fang 1 , David Giovanni 3 , Metikoti Jagadeeswararao 4 , Tze Chien Sum 3 , Nripan Mathews 1, 4 , Subodh G. Mhaisalkar 1, 4 , John V. Hanna 1, 2 , Tim White 1
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Inorganic metal halide perovskite nanocrystals (NCs) are promising materials for emission-based applications; however, the inclusion of toxic lead may limit their commercial viability. This paper describes two cesium cupriferous iodides as nontoxic alternatives to lead containing perovskites. These nanocrystals were synthesized with tailored composition and morphology by a hot-injection colloidal route to produce hexagonal nanoplates (NPs) of blue-emitting Cs3Cu2I5 and nanorods (NRs) of yellow-emitting CsCu2I3. Phase purity was confirmed by Rietveld refinement of X-ray powder diffraction patterns and solid state 133Cs MAS NMR with both compounds exhibiting high thermal stability suitable for optoelectronic technologies. Phase mixing allows linear tuning of Commission Internationale de l’Eclairage (CIE) coordinates from (0.145, 0.055) to (0.418, 0.541) such that a 1:8 molar ratio of Cs3Cu2I5 NPs and CsCu2I3 NRs yields white emission, while the 133Cs MAS NMR demonstrates that these photophysical effects are not attributed to any changes in the Cu oxidation state.
中文翻译：
碘化铯铜定制的纳米板和纳米棒，用于蓝色，黄色和白色发射
无机金属卤化物钙钛矿纳米晶体（NCs）是有前途的基于发射的材料。但是，包含有毒铅可能会限制其商业可行性。本文描述了两种铯铜碘化物，作为含铅钙钛矿的无毒替代品。通过热注入胶体路线合成具有定制的组成和形态的这些纳米晶体，以产生发蓝光的Cs 3 Cu 2 I 5的六角形纳米板（NPs）和发黄光的CsCu 2 I 3的纳米棒（NRs）。通过X射线粉末衍射图和固态133的Rietveld精制确认了相纯度两种化合物的Cs MAS NMR均显示出适用于光电技术的高热稳定性。相混合允许将国际照明委员会（CIE）坐标从（0.145，0.055）线性调整到（0.418，0.541），以使Cs 3 Cu 2 I 5 NP和CsCu 2 I 3 NR的摩尔比为1：8产生白色发射，而133 Cs MAS NMR证明这些光物理效应不归因于Cu氧化态的任何变化。
更新日期：2019-10-28
中文翻译：
碘化铯铜定制的纳米板和纳米棒，用于蓝色，黄色和白色发射
无机金属卤化物钙钛矿纳米晶体（NCs）是有前途的基于发射的材料。但是，包含有毒铅可能会限制其商业可行性。本文描述了两种铯铜碘化物，作为含铅钙钛矿的无毒替代品。通过热注入胶体路线合成具有定制的组成和形态的这些纳米晶体，以产生发蓝光的Cs 3 Cu 2 I 5的六角形纳米板（NPs）和发黄光的CsCu 2 I 3的纳米棒（NRs）。通过X射线粉末衍射图和固态133的Rietveld精制确认了相纯度两种化合物的Cs MAS NMR均显示出适用于光电技术的高热稳定性。相混合允许将国际照明委员会（CIE）坐标从（0.145，0.055）线性调整到（0.418，0.541），以使Cs 3 Cu 2 I 5 NP和CsCu 2 I 3 NR的摩尔比为1：8产生白色发射，而133 Cs MAS NMR证明这些光物理效应不归因于Cu氧化态的任何变化。
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