Figures

Figure 1

Luminescence spectra of a blue LED N17 (room temperature) at different currents, numbers - J, mA; points - approximations by equation 2.

Figure 2

Luminescence spectra of a green diode N18 (room temperature) at different currents, numbers - current J; points - approximations by equation 2.

Figure 3a

Spectra of a blue LED N13 at high currents in dc conditions; points - approximation by equation 2.

Figure 3b

Spectra of a blue LED N13 at high currents in pulse conditions (50 Hz, 5 µs); points - approximation by equation 2.

Figure 4a

Dependence of spectral maxima of a blue LED B17 versus voltage in dc conditions.

Figure 4b

Dependence of spectral maxima of a green LED G18 versus voltage in dc conditions.

Figure 5

Current-voltage characteristics of blue (B1, B2) and green (G1, G2) LEDs with single (B1, G1) and multiple (B2, G2) QW at room temperature (solid curves) and at 80 K (dashed).

Figure 6a

Dependence of integrated intensity and quantum efficiency for a blue B17 diode on the current.

Figure 6b

Dependence of integrated intensity and quantum efficiency for a green G18 diode on the current.

Figure 7

Distributions of charged centers in p-regions of p-n heterojunctions; points - values of NA- at V = 0; begining of abscissa is at the n-interface. Blue (1,3) and green (2,4-6) LEDs with single (1,2) and multiple (3-6) quantum wells.

© 1998 The Materials Research Society