Increasing the extraction efficiency of a light-emitting diode using a pyramid-like phosphor layer

Orudzhev, T.Y., Abdullaeva, S.G., Dzhabbarov, R.D.

Full text «Opticheskii Zhurnal»

Full text on elibrary.ru

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Оруджев Т.Я., Абдуллаева С.Г., Джаббаров Р.Б. Увеличение экстракционной эффективности светодиода применением пирамидообразного люминофорного слоя // Оптический журнал. 2019. Т. 86. № 10. С. 83–89. http://doi.org/10.17586/1023-5086-2019-86-10-83-89

Orudzhev T.Ya., Abdullaeva S.G., Dzhabbarov R.B. Increasing the extraction efficiency of a light-emitting diode using a pyramid-like phosphor layer [in Russian] // Opticheskii Zhurnal. 2019. V. 86. № 10. P. 83–89. http://doi.org/10.17586/1023-5086-2019-86-10-83-89

For citation (Journal of Optical Technology):

T. Ya. Orudzhev, S. G. Abdullaeva, and R. B. Dzhabbarov, "Increasing the extraction efficiency of a light-emitting diode using a pyramid-like phosphor layer," Journal of Optical Technology. 86(10), 671-676 (2019). https://doi.org/10.1364/JOT.86.000671

Abstract:

Improving the efficiency of light extraction is important for the fabrication of high-power white light-emitting diodes (LEDs) with high luminous flux. This article reports on the development of a method for increasing the efficiency of photon extraction in LEDs with phosphor conversion. The presented method is based on the fact that the phosphor layer that converts the emission spectrum of the LED has a three-dimensional structure in the form of pyramids, which allows us to utilize the radiation lost inside the LED by redirecting it to the output. The optical and electrical parameters of the LEDs obtained using this method are studied experimentally. A three-dimensional model of the LED under investigation was built using the SOLIDWORKS software. Monte Carlo ray tracing simulation was performed in Zemax OpticStudio. The experimental data were compared with the data obtained through the simulation.

Keywords:

light-emitting diode, extraction efficiency, complete internal reflection, phosphor

OCIS codes: 230.0250, 260.3800, 080.2740, 220.2945, 220.4840

References:

1. P. Gorrotxategi, M. Consonni, and A. Gasse, “Optical efficiency characterization of LED phosphors using a double integrating sphere system,” J. Solid State Light. 2, 1 (2015).
2. D. A. Steigerwald, J. C. Bhat, D. Collins, R. M. Fletcher, M. O. Holcomb, M. J. Ludowise, P. S. Martin, and S. L. Rudaz, “Illumination with solid state lighting technology,” IEEE J. Sel. Top. Quantum Electron. 8(2), 310–320 (2002).
3. Y. Zheng and M. Stough, “White LED with high package extraction efficiency” (Osram Sylvania Product Inc. Central Research and Service Laboratory, 2008).
4. N. Narendran, “Improved performance white LED,” Proc. SPIE 5941, 45–50 (2005).

5. N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi A 202(6), R60–R62 (2005).
6. M.-T. Lin, S.-P. Ying, M.-Y. Lin, K.-Y. Tai, S.-C. Tai, C. H. Liu, J.-C. Chen, and C.-C. Sun, “Ring remote phosphor structure for phosphor-converted white LEDs,” IEEE Photon. Technol. Lett. 22(8), 574–576 (2010).
7. D. Chen, W. Xiang, X. Liang, J. Zhong, H. Yu, M. Ding, H. Lu, and Z. Ji, “Advances in transparent glass–ceramic phosphors for white light-emitting diodes—a review,” J. Eur. Ceram. Soc. 35(3), 859–869 (2015).
8. S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
9. W.-H. Chao, R.-J. Wu, and T.-B. Wu, “Structural and luminescent properties of YAG:Ce thin film phosphor,” J. Alloys Compd. 506(1), 98–102 (2010).
10. M. Nyman, L. E. Shea-Rohwer, J. E. Martin, and P. Provencio, “Nano-YAG:Ce mechanisms of growth and epoxy-encapsulation,” Chem. Mater. 21(8), 1536–1542 (2009).
11. S. M. Gvozdev, O. K. Kushch, S. A. Safonov, V. A. Khukhtikova, and V. I. Kholodilov, “Estimating the energy efficiency and optimizing the design parameters of lighting devices,” J. Opt. Technol. 80(1), 54–59 (2013) [Opt. Zh. 80(1), 75–81 (2013)].
12. S. N. Lipnitskaya, V. E. Bugrov, A. R. Kovsh, M. A. Odnoblyudov, K. D. Mynbaev, L. A. Nikulina, and A. E. Romanov, “Increasing the light-output efficiency from chip-on-board LED modules,” J. Opt. Technol. 80(12), 751–755 (2013) [Opt. Zh. 80(12), 45–52 (2013)].
13. S. J. Lee, “Analysis of light-emitting diodes by Monte Carlo photon simulation,” Appl. Opt. 40(9), 1427–1437 (2001).