Article
Materials Science, Multidisciplinary
Chuan Liao, Feng Chen, Hao Wu, Huajun Wu, Liangliang Zhang, Guo-hui Pan, Feng Liu, Xiao-jun Wang, Jiahua Zhang
Summary: The highly sensitive afterglow intensity ratio (AIR) thermometry based on thermal quenching (TQ) mechanism using Y3Al2Ga3O12:Pr3+ persistent phosphor is reported. The AIR shows strong temperature dependence in the range of 30-170 degrees C, with a maximum relative sensitivity of up to 4.12% degrees C-1 at 170 degrees C. The method is demonstrated by accurately measuring water temperature with an error of only 0.1 degrees C.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Lipeng Jiang, Liangliang Zhang, Xue Jiang, Guocai Lv, Yanjing Su
Summary: This paper reports a new multifunctional near infrared phosphor AlTaO4:Cr3+, which exhibits both narrow-band and broadband emissions, high relative sensitivity, and efficient broadband NIR luminescence. The NIR LED prepared with this phosphor has practical application value in NIR light sources.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
Xuquan Wang, Pengkun Zhang, Fei Wang, Shimin Liu, Yang Tian, Bin Yang
Summary: A series of Ho3+ doped gadolinium oxide phosphors were synthesized using the co-precipitation method. The structural, morphological, and luminescence properties of the samples were characterized using various techniques. The luminescence of the phosphors prepared by quenching changed from yellow to green, and the red-green ratio decreased. Annealing significantly enhanced the emission intensity and chromatic purity. The effects of Ho3+ concentrations and heating duration on the luminescence properties were investigated experimentally.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Jingjing Tang, Yujian Wu, Minkun Jin, YueXin Li, Changheng Chen, Jinmeng Xiang, Chongfeng Guo
Summary: In this study, a noncontact upconversion optical temperature sensor was developed and a flexible thin-film thermometer was fabricated for detecting the temperature of microelectronic components. The results showed stable emission and sensitivity of the sensor, indicating its potential to replace traditional thermometers.
INORGANIC CHEMISTRY
(2022)
Article
Physics, Condensed Matter
Ilya E. Kolesnikov, Elena Afanaseva, Mikhail A. Kurochkin, Evgenii Yu Kolesnikov, Erkki Lahderanta
Summary: A novel mixed-valent Eu2+/Eu3+-doped MgAl2O4 phosphor is reported as a ratiometric thermal sensor, offering high thermal sensitivity and temperature resolution, making it a promising material for optical thermometry.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Optics
Yang Jin, Lefu Mei, Qingfeng Guo, Libing Liao
Summary: Whitlockite-type phosphors with adjustable chemical compositions and rich crystal positions have been prepared and investigated. The phosphors exhibit blue, yellow, and red emissions due to the presence of Dy3+ and Eu3+ ions. The emission characteristics and temperature sensing performance of the phosphors have been studied, and they show potential applications in w-LEDs, display devices, and as optical thermometers.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
A. M. Voiculescu, S. Hau, G. Stanciu, C. Gheorghe
Summary: A series of Eu3+ doped SrLaGaO4 ceramic phosphors were successfully synthesized, and their optical properties were investigated. The samples showed strong red emission at 620 nm under blue and UV excitation, with a good color purity of 88% for the 10Eu: SrLaGaO4 phosphor. The temperature-dependent luminescence intensity ratio of the samples suggested that the 10Eu: SrLaGaO4 phosphor could be used as a temperature sensor over a wide range of temperatures and as a narrow-band red-emitting phosphor for pc-WLEDs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Chao Wang, Hao Zhang, Yiyu Cai, Qingyuan Wang, Bo Zhou, Xuhui Xu, Xue Yu
Summary: This study explores a thermally-favored Yb3+/Nd3+ co-doped KGaGeO4 up-conversion phosphor with negative thermal quenching behavior. The phosphor exhibits one-photon anti-Stokes emission and shows a remarkable enhancement of emission intensity at high ambient temperatures reaching 653 K. The thermal behavior is attributed to enhanced energy transfer from sensitizers to activators through phonon assistance, as revealed by the introduction of Er3+ ions as a probe. These findings provide insights into the phonon-assisted strategy for highly efficient anti-Stokes emission systems and open possibilities for constructing phonon-favored transitions with nonthermally coupled emissions for luminescence thermometry.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Lixin Peng, Leipeng Li, Feng Qin, Changwen Wang, Zhiguo Zhang
Summary: In recent years, the development of optical thermometry has attracted researchers' interest due to its advantages of non-contact and non-invasive temperature measurement. This study successfully constructed a multi-mode optical thermometer based on the luminescent properties of YVO4: Eu3+ phosphor, and evaluated different temperature measurement strategies. The results showed that the strategy based on the luminescence of the host material had the best sensitivity and temperature uncertainty.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Junshan Hu, Ruonan Wang, Ziqian Wei, Xiao Wu, Fengyi Wang, Lixin Liu, Yanzhuo Li, Hao Fu, Qing-Hua Xu
Summary: Yb3+/Er3+ co-doped beta-Ba2ScAlO5 phosphors with strong red emission and temperature-dependent properties have been prepared through equivalent substitution strategy. The red-green integrated intensity ratio can reach up to 82.5, and the red emission mechanism mainly arises from energy transfer. The optimized doping concentrations of Yb3+ and Er3+ show linear relationship with temperature, indicating potential application in optical thermometry.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Jiantong Wang, Bowen Wang, Yuhan Teng, Changshuai Gong, Xuyan Xue, Xuejiao Wang, Ji-Guang Li
Summary: A novel K3(Y0.88Yb0.10Er0.02)Si2O7 phosphor was synthesized and investigated for its up-conversion luminescence and optical thermometric performance. The phosphor exhibited strong green UC emission and could sense temperature through fluorescence intensity ratio (FIR) and fluorescence lifetime (FL) modes. The maximum absolute sensitivity (SA) and relative sensitivity (SR) were higher than previous studies, with SA = 156 x 10-4 K-1 (I531/I555, 298 K) and SR = 1.80% K-1 (I519/I555, 298 K) via the FIR mode, and SA = 661 x 10-4 K-1 (548 K) and SR = 9.77% K-1 (298 K) via the FL mode.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Muekremin Yilmaz, Emre Alp
Summary: A relatively low-cost blue-emitting Zn2(OH)BO3:Pb2+ phosphor was successfully synthesized through hydrothermal method at low temperature. The effects of dopant concentration on its structural and optical properties were studied, and its temperature sensing capability was evaluated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Thermodynamics
Dustin Witkowski, Joshua M. Herzog, David A. Rothamer
Summary: This work demonstrates precise aerosol phosphor thermometry (APT) measurements over a large temperature range by applying scattering-referenced APT (SRAPT) with the phosphor divalent Europium doped in Barium Magnesium Aluminate (Eu:BAM). The high initial signal intensities of Eu:BAM allowed reliable single-shot measurements to be made continuously from 500 K to greater than 1200K, highlighting the importance of high signal levels for extending the measurement range of SRAPT.
COMBUSTION AND FLAME
(2021)
Article
Engineering, Environmental
Zewen Su, Yingjie Zhao, Youqiang Huang, Yanbang Lian, Shiqing Xu, Gongxun Bai
Summary: This study successfully synthesized a dual-functional composite based on lanthanide-doped nanoparticles and carbon nanotubes for designing a photothermal system. Accurate temperature monitoring and tumor treatment were achieved through an optical thermometer. The multifunctional photothermal material demonstrated advantages of high accuracy and low invasive burden.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Xinguo Zhang, Xin Chen, Cai Zhou, Jiaqi Fan, Weiying Zhou, Jiabao Luo, Lihong Liu, Qi Pang, Peican Chen, Liya Zhou
Summary: We demonstrate that the composition modification of Si/Ge ratio in LiIn(Si2-xGex)O-6: Cr-3+ can precisely tune the emission wavelength of Cr-3+ in the range of 840-900 nm with significant enhancement. The spectral engineering is analyzed based on structural variation and crystal fielding parameters, revealing the origin of PL tuning from a reduction in crystal field due to Ge4+-induced lattice expansion. The strong temperature-dependence of Cr-3+ emission allows for temperature sensing in three ways: peak wavelength variation, fluorescence intensity, and decay lifetime variation. The ability to absorb and emit in the NIR-I biological window makes this phosphor highly potential in deep tissue temperature sensing and imaging applications.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Mechanical
S. A. Tsekenis, D. Wilson, M. Lengden, J. Hyvonen, J. Leinonen, A. Shah, O. Andersson, H. McCann
FLOW MEASUREMENT AND INSTRUMENTATION
(2017)
Article
Engineering, Electrical & Electronic
Thomas Benoy, David Wilson, Michael Lengden, Ian Armstrong, George Stewart, Walter Johnstone
IEEE SENSORS JOURNAL
(2017)
Article
Engineering, Electrical & Electronic
Abhishek Upadhyay, David Wilson, Michael Lengden, Arup L. Chakraborty, George Stewart, Walter Johnstone
IEEE PHOTONICS JOURNAL
(2017)
Article
Thermodynamics
Sofia Korniliou, Coinneach Mackenzie-Dover, John R. E. Christy, Souad Harman, Anthony J. Walton, Khellil Sefiane
APPLIED THERMAL ENGINEERING
(2018)
Article
Thermodynamics
S. Korniliou, C. Mackenzie-Dover, S. Harmand, G. Duursma, J. R. E. Christy, J. G. Terry, A. J. Walton, K. Sefiane
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2019)
Article
Engineering, Electrical & Electronic
Abhishek Upadhyay, Michael Lengden, David Wilson, Gordon Samuel Humphries, Andrew P. Crayford, Daniel G. Pugh, Mark P. Johnson, George Stewart, Walter Johnstone
IEEE PHOTONICS JOURNAL
(2018)
Article
Engineering, Electrical & Electronic
David Wilson, John W. Phair, Michael Lengden
IEEE SENSORS JOURNAL
(2019)
Article
Engineering, Electrical & Electronic
Edward M. D. Fisher, Stylianos-Alexios Tsekenis, Yunjie Yang, A. Chighine, Chang Liu, Nick Polydorides, P. Wright, J. Kliment, K. Ozanyan, Thomas Benoy, Gordon Humphries, David Wilson, M. Lengden, Walter Johnstone, Hugh McCann
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2020)
Article
Optics
Abhishek Upadhyay, Michael Lengden, Godwin Enemali, George Stewart, Walter Johnstone, David Wilson, Gordon Humphries, Thomas Benoy, John Black, Andrea Chighine, Edward Fisher, Rui Zhang, Chang Liu, Nick Polydorides, Alex Tsekenis, Paul Wright, Joshua Kliment, Johan Nilsson, Yutong Feng, Victor Archilla, Javier Rodriguez-Carmona, Jesus Sanchez-Valdepenas, Marta Beltran, Valentin Polo, Ian Armstrong, Iain Mauchline, Douglas Walsh, Mark Johnson, Joanna Bauldreay, Hugh McCann
Summary: This article reports the first attempt to implement chemically specific imaging in the exhaust plume of a gas turbine typical of those used for propulsion in commercial aircraft. The method used is chemical species tomography (CST), and the target species is CO2, which absorbs in the near-infrared at 1999.4 nm. The CO2 absorption spectrum is measured using tunable diode laser spectroscopy with wavelength modulation. The results of the study provide valuable insights for turbine combustion research, turbine engine development, and aviation fuel research and development.
Article
Optics
Nick Polydorides, Alex Tsekenis, Edward Fisher, Andrea Chighine, Hugh McCann, Luca Dimiccoli, Paul Wright, Michael Lengden, Thomas Benoy, David Wilson, Gordon Humphries, Walter Johnstone
Proceedings Paper
Engineering, Electrical & Electronic
C. M. Mackenzie Dover, Y. Li, S. Korniliou, K. Sefiane, J. G. Terry, A. J. Walton
Proceedings Paper
Engineering, Aerospace
Paul Wright, David McCormick, Krikor Ozanyan, Mark Johnson, John Black, Edward Fisher, Andrea Chighine, Nick Polydorides, Hugh McCann, Yutong Feng, Khouler Khan, Paul Bastock, Fuqiang Jia, Dan Hewak, Johan Nilsson, Michael Lengden, David Wilson, Ian Armstrong, Thomas Benoy, Walter Johnstone
2015 IEEE AEROSPACE CONFERENCE
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
Andrea Chighine, Edward Fisher, David Wilson, Michael Lengden, Walter Johnstone, Hugh McCann
2015 IEEE INTERNATIONAL CONFERENCE ON IMAGING SYSTEMS AND TECHNIQUES (IST) PROCEEDINGS
(2015)