Germanium-OLED short-wave infrared-to-visible upconverters

Tianyu Rao; Yawei Qi; Qun Hao; Menglu Chen; Xin Tang; Ge Mu

doi:10.1063/5.0165818

Germanium-OLED short-wave infrared-to-visible upconverters

Tianyu Rao, Yawei Qi, Qun Hao, Menglu Chen, Xin Tang^*, Ge Mu^*

^*Corresponding author for this work

School of Optics and Photonics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Infrared-to-visible upconverters consisting of infrared photodetectors (PDs) with visible light-emitting diodes (LEDs) to directly visualize infrared images without intermediate electronics have stimulated research interest. However, existing upconverters mostly detect infrared only in the near-infrared region, preventing the extensive short-wave infrared (SWIR) application. Here, we innovatively integrate strong-SWIR-response n-type germanium (Ge)/indium tin oxide (ITO) PDs with phosphorescence organic LEDs (OLEDs) to realize the efficient upconversion of SWIR to green light through a simple fabrication process. The ITO layers not only construct Schottky heterojunction with the Ge to improve SWIR detection ability but also provide the photogenerated carriers transport channel from PDs to OLEDs. As a result, the Ge-OLED upconverters exhibit the efficient upconversion of SWIR and high p-p efficiency of 7%.

Original language	English
Article number	241109
Journal	Applied Physics Letters
Volume	123
Issue number	24
DOIs	https://doi.org/10.1063/5.0165818
Publication status	Published - 11 Dec 2023

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title = "Germanium-OLED short-wave infrared-to-visible upconverters",

abstract = "Infrared-to-visible upconverters consisting of infrared photodetectors (PDs) with visible light-emitting diodes (LEDs) to directly visualize infrared images without intermediate electronics have stimulated research interest. However, existing upconverters mostly detect infrared only in the near-infrared region, preventing the extensive short-wave infrared (SWIR) application. Here, we innovatively integrate strong-SWIR-response n-type germanium (Ge)/indium tin oxide (ITO) PDs with phosphorescence organic LEDs (OLEDs) to realize the efficient upconversion of SWIR to green light through a simple fabrication process. The ITO layers not only construct Schottky heterojunction with the Ge to improve SWIR detection ability but also provide the photogenerated carriers transport channel from PDs to OLEDs. As a result, the Ge-OLED upconverters exhibit the efficient upconversion of SWIR and high p-p efficiency of 7%.",

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AU - Rao, Tianyu

AU - Qi, Yawei

AU - Hao, Qun

AU - Chen, Menglu

AU - Tang, Xin

AU - Mu, Ge

PY - 2023/12/11

Y1 - 2023/12/11

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AB - Infrared-to-visible upconverters consisting of infrared photodetectors (PDs) with visible light-emitting diodes (LEDs) to directly visualize infrared images without intermediate electronics have stimulated research interest. However, existing upconverters mostly detect infrared only in the near-infrared region, preventing the extensive short-wave infrared (SWIR) application. Here, we innovatively integrate strong-SWIR-response n-type germanium (Ge)/indium tin oxide (ITO) PDs with phosphorescence organic LEDs (OLEDs) to realize the efficient upconversion of SWIR to green light through a simple fabrication process. The ITO layers not only construct Schottky heterojunction with the Ge to improve SWIR detection ability but also provide the photogenerated carriers transport channel from PDs to OLEDs. As a result, the Ge-OLED upconverters exhibit the efficient upconversion of SWIR and high p-p efficiency of 7%.

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Germanium-OLED short-wave infrared-to-visible upconverters

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