Light-emitting diode chip having temperature compensation of the wavelength

Abstract

The invention relates to an optoelectronic semiconductor chip (10), comprising: a p-type semiconductor region (4), an n-type semiconductor region (6), an active layer (5), which is arranged between the p-type semiconductor region (4) and the n-type semiconductor region (6) and which is designed as a multiple quantum well structure (51, 52), wherein the multiple quantum well structure (51, 52) has a first region (51) of alternating first quantum well layers (51A) and first barrier layers (51B) and a second region having at least one second quantum well layer (52A) and at least one second barrier layer (52B), the at least one second quantum well layer (52A) has an electronic band gap (E QW2) that is less than the electronic band gap (E QW1) of the first quantum well layers (51A), the at least one second barrier layer (52B) has an electronic band gap (E B2) that is greater than the electronic band gap (E B1) of the first barrier layers (51B).

Description

technical field [0001] The invention relates to an optoelectronic semiconductor chip. [0002] Cross-References to Related Applications [0003] This application claims priority from German patent application 10 2014 117 611.1, the disclosure content of which is hereby incorporated by reference. Background technique [0004] The optical and electronic properties of semiconductor materials are primarily determined by the bandgap, the energy gap between the valence and conduction bands. The bandgap of semiconductor materials generally decreases with increasing temperature. In radiation-emitting optoelectronic semiconductor chips, such as LEDs or semiconductor lasers, this can result in an increase in the wavelength of the emitted radiation with increasing operating temperature. The color impression of the emitted radiation can thereby be changed. [0005] It is also known that the sensitivity of the naked eye decreases at wavelengths above about 560 nm. In optoelectronic ...

AI Technical Summary

Problems solved by technology

[0005] It is also known that the human eye is less sensitive at wavelengths above about 560nm

In optoelectronic semiconductor chips that emit at higher wavelengths, for this reason a temperature-dependent increase in the emission wavelength can lead not only to a changed color impression, but also to a visually perceived reduction in brightness

Images