Pengfei Chao, Yingchao Xu, Chunhui Liu, Tianyu Wu, Yangyang Li, Jianning Liu. Optimization and Preparation of GaN-Based LED Chip Electrode Structure[J]. Laser & Optoelectronics Progress, 2020, 57(7): 072301
- Laser & Optoelectronics Progress
- Vol. 57, Issue 7, 072301 (2020)
Fig. 1. Schematic diagram of internal current path of a GaN-based LED chip
Fig. 2. Three-dimensional diagram of LED chips with different electrode structures. (a) Primitive structure; (b) change N electrode structure; (c) change N electrode and offset P electrode structure; (d) change N electrode and shorten P electrode structure
Fig. 3. Current density distribution of active layer of LED chip with different electrode structures. (a) Primitive structure; (b) change N electrode structure; (c) change N electrode and offset P electrode structure; (d) change N electrode and shorten P electrode structure
Fig. 4. Photo of the sample after production. (a) Primitive structure; (b) change N electrode structure; (c) change N electrode and offset P electrode structure; (d) change N electrode and shorten P electrode structure
Fig. 5. Near-field optical test chart of the sample. (a) Primitive structure; (b) change N electrode structure; (c) change N electrode and offset P electrode structure; (d) change N electrode and shorten P electrode structure
Fig. 6. I-V characteristics of four samples
Fig. 7. I-P characteristics of four samples
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Table 1. Structural parameters of COMSOL electrical model
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Table 2. Test data for four groups of samples
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