Se­mi­con­duc­tor na­no­wire/gra­phe­ne hy­brids for high-​efficiency light emit­ting di­odes - NA­GRA­LED

Pro­ject sum­ma­ry

The goal of this pro­ject is to de­ve­lop high-​efficiency, fle­xi­ble, light emit­ting di­odes (LEDs) using the epi­ta­xi­al growth of InGaN na­no­wire (NW) ar­rays on gra­phe­ne. InGaN is being wi­de­ly used in com­mer­cial thin film LEDs, but as a two-​dimensional (2D) film form it al­ways re­qui­res thick, ex­pen­si­ve single-​crystalline sub­stra­tes for high qua­li­ty epi­ta­xi­al growth. Due to the hig­her surface-​to-volume ratio of NW struc­tu­re, it can give hig­her light emis­si­on ef­fi­ci­en­cy and it is also much more cost-​efficient. Gra­phe­ne is a one-​atom thick he­xa­go­nal car­bon crys­tal with re­cord high electric and ther­mal con­duc­ti­vi­ty as well as being trans­pa­rent and very strong and fle­xi­ble. Our un­i­que con­cept in this pro­ject is to in­te­gra­te InGaN NWs and gra­phe­ne toge­ther and uti­li­ze NW’s and gra­phe­ne’s in­na­te me­rits to rea­li­ze high-​efficiency full-​color LEDs that can be light­weight and fle­xi­ble, po­sing a huge po­ten­ti­al in fu­ture solid-​state ligh­ting and dis­play ap­p­li­ca­ti­ons.