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Research data supporting "Porous pseudo-substrates for InGaN quantum well growth: morphology, structure and strain relaxation"


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Authors

Ji, Yihong 
Zhang, Xiaotian 
Pongrácz, Jakub 
Fairclough, Simon 

Description

Zip folder containing X-ray diffraction scans and simulation files (.txt files) from partially relaxed porous InGaN superlattice pseudo-substrates an InGaN multiple quantum well (MQW) structures grown on such templates. The pseudo-substrates were porosified by electro-chemical etching at different etching voltages, in which a sub-surface InGaN/InGaN superlattice was etched via threading dislocations acting as etching channels.

File: "Fig 3 - XRD_104_rsm (as-grown SL template).txt" contains X-ray diffraction (XRD) data of the 10-14 reflection for the as-grown InGaN supperlattice (SL) template (sample A1)

File: "Fig 3 - XRD_104_rsm (porous SL template).txt" contains XRD data of the 10-14 reflection for the porosified InGaN SL template (sample A2)

File: "Fig 3 - XRD_105_rsm (as-grown SL template).txt" contains XRD data of the 10-15 reflection for the as-grown InGaN SL template (sample A1)

File: "Fig 3 - XRD_105_rsm (porous SL template).txt" contains XRD data of the 10-15 reflection for the porosified InGaN SL template (sample A2)

File: "Fig 3 - XRD_204_rsm (as-grown SL template).txt" contains XRD data of the 20-24 reflection for the as-grown InGaN SL template (sample A1)

File: "Fig 3 - XRD_204_rsm (porous SL template).txt" contains XRD data of the 20-24 reflection for the porosified InGaN SL template (sample A2)

File: "Fig 3 - XRD_205_rsm (as-grown SL template).txt" contains XRD data of the 20-25 reflection for the as-grown InGaN SL template (sample A1)

File: "Fig 3 - XRD_205_rsm (porous SL template).txt" contains XRD data of the 20-25 reflection for the porosified InGaN SL template (sample A2)

File: "Fig 4a - XRD_002_w2t-scan (as-grown SL template).txt" contains XRD w2t scan data of the 0002 reflection for the as-grown InGaN SL template (sample A1)

File: "Fig 4a & 4b - XRD_002_w2t-scan (porous SL template).txt" contains XRD w2t scan data of the 0002 reflection for the porosified InGaN SL template (sample A2)

File: "Fig 4 - XRD_002_w2t-simulation (as-grown SL template, 9.15%_6.10% fully strained).txt" contains simulated w2t-scans of the 0002 XRD refelction for the as-grown SL template (sample A1). It assumes that the InGaN/InGaN SL is fully strained and consists of alternating InxGa(1-x)N layers with compositions of x = 9.15% and x = 6.10%

File: "Fig 4b - XRD_002_w2t-simulation (porous SL template, 8.85%_5.90% partially relaxed).txt" contains simulated w2t-scans of the 0002 XRD refelction for the porosified SL template (sample A2). It assumes that the InGaN/InGaN SL is partially relaxed and consists of alternating InxGa(1-x)N layers with compositions of x = 8.85% and x = 5.90%

File: "Fig 4b - XRD_002_w2t-simulation (porous SL template, 9.15%_6.10% partially relaxed).txt" contains simulated w2t-scans of the 0002 XRD refelction for the porosified SL template (sample A2). It assumes that the InGaN/InGaN SL is partially relaxed and consists of alternating InxGa(1-x)N layers with compositions of x = 9.15% and x = 6.10%

File: "Fig 7a - XRD_104_rsm (sample B2, non-porous wafer edge).txt" contains XRD data of the 10-14 reflection for the non-porosified edge of sample B2.

File: "Fig 7b - XRD_104_rsm (sample B2, porous centre).txt" contains XRD data of the 10-14 reflection for the porosified centre of sample B2. The InGaN SL template of this sample was porosified at a medium etch voltage and was then overgrown with a multi-quantum well (MQW) structure.

File: "Fig 7c - Relaxation degree as function of average porosity.txt" contains relaxation degree as function of average porosity

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Keywords

AFM, microLEDs, porous GaN, TEM, XRD

Publisher

Sponsorship
Innovate UK (TS/V011596/1 - 107470)
Engineering and Physical Sciences Research Council (EP/P024947/1)
Engineering and Physical Sciences Research Council (EP/R00661X/1)
We would like to thank Innovate UK for the financial support within the Collaborative Research and Development scheme “Porous InGaN for Red LEDs (PIRL)” (Ref. No. 107470) and the EPSRC for support through Cambridge Royce Facilities Grant (No. EP/P024947/1) and Sir Henry Royce Institute—Recurrent Grant No. EP/R00661X/1. This work was also supported by the Royal Academy of Engineering under the Chair in Emerging Technologies program.
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