Degradation processes of 280 nm high power DUV LEDs: impact on parasitic luminescence

Trivellin Nicola; Monti Desiree; Piva Francesco; Buffolo Matteo; De Santi Carlo; Zanoni Enrico; Meneghesso Gaudenzio; Meneghini Matteo

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Degradation processes of 280 nm high power DUV LEDs: impact on parasitic luminescence

机译：280 nm高功率DUV LED的降解过程：对寄生发光的影响

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With this work we report on characterization and reliability analysis of 280 nm high power commercial LEDs emitting 18 mW at 200 mA, with a peak wavelength of 280 nm. Spectral characterization reports the presence of a main emission peak and a sideband peak separated by 0.8 eV. DLTS analysis has also been carried out identifying two different defect traps, a deep level for electrons with E-a = 0.73-0.92 eV and a shallow level for holes with E-a = 0.18-0.28 eV. Results from constant current degradation tests report two different degradation mechanisms, a first degradation kinetic more noticeable at high current and a second more intense kinetic correlated to the increase of a third peak at higher wavelength. The work then suggests a reasoned interpretation by comparing the results with literature. (C) 2019 The Japan Society of Applied Physics

机译：通过这项工作，我们报告了280nm高功率商业LED的表征和可靠性分析，在200mA下发射18 mW，峰值波长为280nm。光谱表征报告了主发射峰的存在和由0.8eV分开的边带峰。 DLTS分析也已经进行了识别两个不同的缺陷陷阱，为电子带有E-A = 0.73-0.92 EV的深度和浅水平，孔的孔= 0.18-0.28eV。恒定电流降解试验的结果报告了两种不同的劣化机制，在高电流下更明显的第一降解动力学和第二个更强烈的动力学与较高波长下的第三峰的增加相关。然后，该作品通过将结果与文献进行比较来说，建议解释。（c）2019年日本应用物理学会

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《Japanese journal of applied physics》 |2019年第sc期|SCCC19.1-SCCC19.5|共5页
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Trivellin Nicola; Monti Desiree; Piva Francesco; Buffolo Matteo; De Santi Carlo; Zanoni Enrico; Meneghesso Gaudenzio; Meneghini Matteo;
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Univ Padua Dept Informat Engn Via Gradenigo 6B I-35131 Padua Italy|LightCube SRL Viale Nav Interna 51 I-35129 Padua Italy;

Univ Padua Dept Informat Engn Via Gradenigo 6B I-35131 Padua Italy;

Univ Padua Dept Informat Engn Via Gradenigo 6B I-35131 Padua Italy;

Univ Padua Dept Informat Engn Via Gradenigo 6B I-35131 Padua Italy;

Univ Padua Dept Informat Engn Via Gradenigo 6B I-35131 Padua Italy;

Univ Padua Dept Informat Engn Via Gradenigo 6B I-35131 Padua Italy;

Univ Padua Dept Informat Engn Via Gradenigo 6B I-35131 Padua Italy;

Univ Padua Dept Informat Engn Via Gradenigo 6B I-35131 Padua Italy;

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Degradation processes of 280 nm high power DUV LEDs: impact on parasitic luminescence

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