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oai:recercat.cat:2117/4022892026-01-21T05:56:15Zcom_2072_1033col_2072_452950

InSb/InP core-shell colloidal quantum dots for sensitive and fast short-wave infrared photodetectors Peng, Lucheng Wang, Yongjie Ren, Yurong Wang, Zhuoran Cao, Pengfei Konstantatos, Gerasimos Àrees temàtiques de la UPC::Enginyeria electrònica::Optoelectrònica Optoelectronic devices Quantum dots Infrared detectors Optical detectors III-V Colloidal quantum dots InSb Photodetectors Short-wave infrared Dispositius optoelectrònics Punts quàntics Detectors de raigs infraroigs Detectors òptics Colloidal quantum dot (CQD) technology is considered the main contender toward a low-cost high-performance optoelectronic technology platform for applications in the short-wave infrared (SWIR) to enable 3D imaging, LIDAR night vision, etc. in the consumer electronics and automotive markets. In order to unleash the full potential of this technology, there is a need for a material that is environmentally friendly, thus RoHS compliant, and possesses adequate optoelectronic properties to deliver high-performance devices. InSb CQDs hold great potential in view of their RoHS-compliant nature and-in principle-facile access to the SWIR. However, to date progress in realizing high-performance optoelectronic devices, including photodetectors (PDs), has been limited. Here, we have developed a synthesis method for producing size-tunable InSb CQDs with distinct excitonic peaks spanning a wide range from 900 to 1750 nm. To passivate the surface defects and enhance the photoluminescence (PL) efficiency of InSb CQDs, we further designed an InSb/InP core–shell structure. By employing the InSb/InP core–shell CQDs in a photodiode device stack, we report on robust InSb CQD SWIR photodetectors that exhibit an external quantum efficiency (EQE) of 25% at 1240 nm, a wide linear dynamic range exceeding 128 dB, a photoresponse time of 70 ns, and a specific detectivity of 4.4 × 1011 jones. Peer Reviewed Postprint (published version) 2024-02-02 Article Peng, L. [et al.]. InSb/InP core-shell colloidal quantum dots for sensitive and fast short-wave infrared photodetectors. "ACS nano", 2 Febrer 2024, vol. 18, núm. 6, p. 5113-5121. 1936-0851 https://hdl.handle.net/2117/402289 10.1021/acsnano.3c12007 eng https://pubs.acs.org/doi/10.1021/acsnano.3c12007 info:eu-repo/grantAgreement/EC/H2020/101002306/EU/Mid- and Long-wave infrared Colloidal Quantum Dot Optoelectronics/INFRADOT info:eu-repo/grantAgreement/EC/HE/101119489/EU/2D materials enabled Wide spectrum image sensors and optical NEURAL network based low power consumption computer VISION/2DNEURALVISION info:eu-repo/grantAgreement/EC/HE/101052595/EU/Short-wave infrared photodetectors based on low-cost, environmentally friendly InSb colloidal quantum dots/ECOSWIR http://creativecommons.org/licenses/by-nc-nd/4.0/ Open Access Attribution-NonCommercial-NoDerivatives 4.0 International 9 p. application/pdf