Graphene Quantum Dot-Sensitized ZnO-Nanorod/GaN-Nanotower Heterostructure-Based High-Performance UV Photodetectors
Source abstract
Abstract
The fabrication of a superior-performance ultraviolet (UV) photodetector utilizing graphene quantum dots (GQDs) as a sensitization agent on a ZnO-nanorod/GaN-nanotower heterostructure has been realized. GQD sensitization displays substantial impact on the electrical as well as the optical performance of a heterojunction UV photodetector. The GQD sensitization stimulates charge carriers in both ZnO and GaN and allows energy band alignment, which is realized by a spontaneous time-correlated transient response. The fabricated device demonstrates an excellent responsivity of 3.2 × 103 A/W at −6 V and displays an enhancement of ∼265% compared to its bare counterpart. In addition, the fabricated heterostructure UV photodetector exhibits a very high external quantum efficiency of 1.2 × 106%, better switching speed, and signal detection capability as low as ∼50 fW.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: ZnO doping and properties · Ga2O3 and related materials · Carbon and Quantum Dots Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
CSIR-National Physical Laboratory, Dr K.S. Krishnan Road, New Delhi 110012, India
Department of Electronics & Communication Engineering, Delhi Technological University, New Delhi 110042, India
The University of Melbourne, Parkville, Victoria 3010, Australia
Academy of Scientific & Innovative Research, CSIR-HRDC Campus, Ghaziabad, Uttar Pradesh 201002, India
Funding
Department of Science and Technology, Ministry of Science and Technology · Council for Scientific and Industrial Research
References (59)
Show source-provided references
1. 10.1002/adma.20130180210.1002/adma.201301802 ↗
2. 10.1039/d0tc03219k10.1039/d0tc03219k ↗
3. 10.1021/nl101097710.1021/nl1010977 ↗
4. 10.1016/j.apsusc.2019.01.19210.1016/j.apsusc.2019.01.192 ↗
5. 10.1002/adfm.20190990910.1002/adfm.201909909 ↗
6. 10.1039/c4ee03271c10.1039/c4ee03271c ↗
7. 10.1038/nnano.2010.7810.1038/nnano.2010.78 ↗
8. 10.1021/acsanm.0c0153910.1021/acsanm.0c01539 ↗
9. 10.1016/j.jallcom.2015.01.15510.1016/j.jallcom.2015.01.155 ↗
10. 10.1002/smll.20120240810.1002/smll.201202408 ↗
11. 10.1021/acsami.7b1881510.1021/acsami.7b18815 ↗
12. 10.1002/lpor.20160025710.1002/lpor.201600257 ↗
13. 10.1002/adma.20130182810.1002/adma.201301828 ↗
14. 10.1021/jp808870z10.1021/jp808870z ↗
15. 10.1088/1361-6641/aae99610.1088/1361-6641/aae996 ↗
16. 10.1063/1.489359110.1063/1.4893591 ↗
17. 10.1088/2053-1591/ab66ab10.1088/2053-1591/ab66ab ↗
18. 10.1039/c8tc00978c10.1039/c8tc00978c ↗
19. 10.1016/j.jallcom.2019.06.21510.1016/j.jallcom.2019.06.215 ↗
20. 10.1039/c4tc02390k10.1039/c4tc02390k ↗
21. 10.1007/s13391-015-5128-410.1007/s13391-015-5128-4 ↗
22. 10.1039/c7nj01140g10.1039/c7nj01140g ↗
23. 10.1016/j.sna.2016.02.03810.1016/j.sna.2016.02.038 ↗
24. 10.1109/tnano.2013.226055710.1109/tnano.2013.2260557 ↗
25. 10.1002/adma.20100315610.1002/adma.201003156 ↗
26. 10.1021/acsami.5b0318410.1021/acsami.5b03184 ↗
27. 10.1002/adom.20140002310.1002/adom.201400023 ↗
28. 10.1016/j.snb.2013.08.03810.1016/j.snb.2013.08.038 ↗
29. 10.1038/srep2326010.1038/srep23260 ↗
30. 10.1016/j.materresbull.2017.10.01410.1016/j.materresbull.2017.10.014 ↗
31. 10.1186/s11671-018-2672-510.1186/s11671-018-2672-5 ↗
32. 10.1002/adma.20180828310.1002/adma.201808283 ↗
33. 10.1063/1.46125810.1063/1.461258 ↗
34. 10.1038/nmat184910.1038/nmat1849 ↗
35. 10.1021/acsami.6b0976610.1021/acsami.6b09766 ↗
36. 10.1039/c3an36705c10.1039/c3an36705c ↗
37. 10.1016/j.materresbull.2017.07.03810.1016/j.materresbull.2017.07.038 ↗
38. 10.1016/j.orgel.2017.11.02410.1016/j.orgel.2017.11.024 ↗
39. 10.1155/2011/62820310.1155/2011/628203 ↗
40. 10.1002/adma.20090282510.1002/adma.200902825 ↗
41. 10.1002/adma.20100381910.1002/adma.201003819 ↗
42. 10.1371/journal.pone.014490610.1371/journal.pone.0144906 ↗
43. 10.1039/c2cc35559k10.1039/c2cc35559k ↗
44. 10.1021/am404017410.1021/am4040174 ↗
45. 10.1002/aelm.20170003610.1002/aelm.201700036 ↗
46. 10.1016/j.optmat.2020.10982010.1016/j.optmat.2020.109820 ↗
47. 10.1016/j.mser.2005.11.00110.1016/j.mser.2005.11.001 ↗
48. 10.1063/1.160580810.1063/1.1605808 ↗
49. 10.1088/0957-4484/20/15/15520210.1088/0957-4484/20/15/155202 ↗
50. 10.1039/c6nr02614a10.1039/c6nr02614a ↗
51. 10.1007/s10854-018-8917-310.1007/s10854-018-8917-3 ↗
52. 10.1063/1.477665110.1063/1.4776651 ↗
53. 10.1063/1.497842710.1063/1.4978427 ↗
54. 10.1021/acsomega.0c0123910.1021/acsomega.0c01239 ↗
55. 10.1021/jp108320j10.1021/jp108320j ↗
56. Milnes A. G. · 1972
57. 10.1063/1.32824310.1063/1.328243 ↗
58. 10.1021/jz200450r10.1021/jz200450r ↗
59. 10.1021/nl101060h10.1021/nl101060h ↗