Improving Moisture Resistance of K2SiF6∶Mn4+ <italic style="font-style: italic">via</italic> Passivation Effect of Lactobionic Acid

WAN Ping-ping; YANG Jing; LIU Hong-xiu; LIU De-quan; ZHOU Wen-li

doi:10.37188/CJL.20220127

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Improving Moisture Resistance of K₂SiF₆∶Mn⁴⁺ via Passivation Effect of Lactobionic Acid

Luminescence Industry and Technology Frontier | 更新时间：2022-10-19

- Improving Moisture Resistance of K₂SiF₆∶Mn⁴⁺ via Passivation Effect of Lactobionic Acid
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 8, Pages: 1300-1308(2022)
- 作者机构：
  
  1.湖南师范大学化学化工学院，湖南长沙　410081
  2.湖南普斯赛特光电科技有限公司，湖南长沙　410116
- 作者简介：
- 基金信息：
  
  Natural Science Foundation of Changsha(kq2202235);The Opening Fund of Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research（Hunan Normal University）, Ministry of Education（KLCBTCMR20‐23）
- DOI：10.37188/CJL.20220127
  CLC： O611.3
- Published：05 August 2022，
  
  Received：09 April 2022，
  
  Revised：23 April 2022，
- 稿件说明：
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万萍萍,杨静,刘红秀等.利用乳糖酸的钝化效应提升K₂SiF₆∶Mn⁴⁺的耐湿性[J].发光学报,2022,43(08):1300-1308.

WAN Ping-ping,YANG Jing,LIU Hong-xiu,et al.Improving Moisture Resistance of K₂SiF₆∶Mn⁴⁺via Passivation Effect of Lactobionic Acid[J].Chinese Journal of Luminescence,2022,43(08):1300-1308.
万萍萍,杨静,刘红秀等.利用乳糖酸的钝化效应提升K₂SiF₆∶Mn⁴⁺的耐湿性[J].发光学报,2022,43(08):1300-1308. DOI： 10.37188/CJL.20220127.

WAN Ping-ping,YANG Jing,LIU Hong-xiu,et al.Improving Moisture Resistance of K₂SiF₆∶Mn⁴⁺via Passivation Effect of Lactobionic Acid[J].Chinese Journal of Luminescence,2022,43(08):1300-1308. DOI： 10.37188/CJL.20220127.

摘要

耐湿性差是掺Mn

氟化物红色荧光粉在高稳定性器件应用中面临的一个瓶颈问题。本工作提出利用乳糖酸的钝化效应清除K

SiF

∶Mn

表面的Mn

，重构无Mn

的氟化物惰性壳层，以提升其耐湿性。结果表明，经乳糖酸钝化后的氟化物的晶相、形貌及发光强度几乎不变。水浸360 h后，钝化的氟化物的内量子效率为96.9%，远高于未处理的氟化物的59.8%。经乳糖酸处理，水解后的氟化物的内量子产率可以恢复到98.8%。在60 mA驱动电流下，将钝化后的氟化物作为红光成分，封装了相关色温为3 518 K、显色指数为88.5、发光效率为130.61 lm·W

-1

的暖白光LED。在高温（85

℃）高湿（85%）环境中老化500 h后，该LED器件具有较高稳定性，光效可维持为初始值的90.5%，高于未经处理的氟化物所封装的白光器件（82.3%）。因此，简单的乳糖酸处理可以有效提升掺Mn

氟化物的耐湿性。本工作可为高稳定性氟化物红色荧光粉的工业化生产提供借鉴。

Abstract

Poor moisture resistance is a bottleneck for the application of Mn

-doped fluoride red phosphors in high-stability devices. This work proposes to use the passivation effect of lactobionic acid to remove Mn

on the surface of K

SiF

∶Mn

， and reconstruct the Mn

-free fluoride inert shell to improve its moisture resistance. The results show that the crystal phase， morphology and luminescence intensity of the passivated fluoride are almost unchanged. After 360 h of water immersion， the internal quantum efficiency of the passivated fluoride is 96.9%， which is much higher than that（59.8%） of the untreated fluoride. After treatment with lactobionic acid， the internal quantum yield of hydrolyzed fluoride can be recovered to 98.8%. At a driving current of 60 mA， a warm white LED with a correlated color temperature of 3 518 K， a color rendering index of 88.5， and a luminous efficiency of 130.61 lm·W

-1

was encapsulated by using the passivated fluoride as the red-light component. After aging in a high temperature（85 ℃） and high humidity（85%） environment for 500 h， the LED device has high stability， and the luminous efficiency can maintain at 90.5% of the initial value， which is higher than that（82.3%） of white LED encapsulated with the untreated fluoride. Therefore， the simple lactobionic acid treatment can effectively improve the moisture resistance of Mn

-doped fluorides. This work can provide a reference for the industrial production of highly stable fluoride red phosphors.

关键词

K2SiF6∶Mn4+耐湿性惰性壳层白光LED乳糖酸

Keywords

K2SiF6∶Mn4+moisture resistanceinert shellwhite LEDlactobionic acid

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Related Institution

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Department of Physics， Changchun Normal University

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⁰

Improving Moisture Resistance of K2SiF6∶Mn4+ via Passivation Effect of Lactobionic Acid

DOI：10.37188/CJL.20220127

摘要

Abstract

关键词

Keywords

references

Improving Moisture Resistance of K₂SiF₆∶Mn⁴⁺ via Passivation Effect of Lactobionic Acid