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 Title: Growth and Characterization of Lattice-Mismatched In(x)ga(1-X)p Yellow Light Emitting Diodes on GaP Author(s): Liu, Paul Doctoral Committee Chair(s): Hsieh, Kuang-Chien Department / Program: Electrical Engineering Discipline: Electrical Engineering Degree Granting Institution: University of Illinois at Urbana-Champaign Degree: Ph.D. Genre: Dissertation Subject(s): Engineering, Materials Science Abstract: To demonstrate the feasibility of using a lattice-mismatched substrate, performance data of yellow LEDs using the step-graded buffer on a GaP substrate are given. These devices have an active region consisting of $\rm In\sb{0.3}Ga\sb{0.7}P$ that is in between an n-type, step-graded buffer and a top p-type contact. Because the GaP substrate is transparent to yellow light, LEDs deposited directly on these substrates can have up to two times greater efficiency than those deposited on absorbing substrates. After annealing, these devices operate at a wavelength of 5940 A at room temperature, but they exhibit lower than expected room temperature external quantum efficiencies. Reasons for these performance characteristics are studied and discussed. Issue Date: 1997 Type: Text Language: English Description: 93 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1997. URI: http://hdl.handle.net/2142/81192 Other Identifier(s): (MiAaPQ)AAI9737181 Date Available in IDEALS: 2015-09-25 Date Deposited: 1997
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