We investigated graphene-based transparent electrodes for InGaN/GaN light emitting diodes(LED). Nano-dotted layer of Ag and Ni were inserted between p-GaN and graphene to achieve low contact resistance and high transmittance. Heat treated Ag layer/graphene had low contact resistance of 0.7~1.2Ω/cm2, and we could achieve better luminance for GaN-based LED. However, for patterned Ni layer/graphene
Layer.’ Its primary goal was to reduce the worldwide production and use of CFCs. This protocol is the result of years of negotiation fostered by the UNEP (United Nations Environment Programme) among the major CFC producing countries. It was also ratified based upon a growing international consensus on the need to protect stratospheric ozone from depletion by CFCs. The Montreal Protocol is a lan
but we have nevertheless been polluting it for years.
The atmosphere can be divided vertically into four major layers : troposphere, stratosphere, mesosphere, and thermosphere.
Figure 2.1 The earth’s atmosphere is subdivided vertically into four major regions based on the air-temperature profile. The ozone layer that protects us from the sun’s UV radiation is in the stratosphere.
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