公开(公告)号：US20210375957A1

公开(公告)日：2021-12-02

申请号：US16769693

申请日：2018-12-05

Applicant: OHIO STATE INNOVATION FOUNDATION

Inventor： Sanjay Krishna ,  Earl Fuller ,  Waleed Khalil ,  Theodore RONNINGEN ,  Alireza Kazemi ,  Dale Shane Smith ,  Teressa Specht ,  Ramy Tantawy

IPC: H01L27/142 ,  H01L27/146 ,  H01L31/103 ,  H01L31/108 ,  H03K17/785

Abstract: An open circuit voltage photodetector comprises a photovoltaic device including a photovoltaic junction, and a transistor. The photovoltaic device is connected to the gate terminal of the transistor to input an open circuit voltage of the photovoltaic device to the gate terminal. An array of such photodetectors and a readout integrated circuit forms an image sensor. In a photodetection method, an open circuit voltage is generated in a photovoltaic device in response to illumination by incident radiation, and the open circuit voltage is applied to a gate terminal of a transistor to modulate a channel current flowing in a channel of the transistor. A readout electronic circuit may be fabricated with an extra transistor, and a photovoltaic device disposed on the readout electronic circuit and electrically connected to apply an open circuit voltage of the photovoltaic device to a gate of the extra transistor.

公开(公告)号：US20240035961A1

公开(公告)日：2024-02-01

申请号：US18362430

申请日：2023-07-31

Applicant: Ohio State Innovation Foundation

Inventor： Christopher Ball ,  Theodore Ronningen ,  Douglas Fink ,  Brett Ringel ,  Sanjay Krishna ,  Earl Fuller ,  Douglas Mooney

IPC: G01N21/3504

CPC classification number: G01N21/3504

Abstract: A system and method indicate capability for detecting methane leaks inside buildings. This approach provides the ability to detect methane behind high efficiency coated windows and can extract methane concentration (rather than concentration-path length product CL). Lock-in imaging technologies can facilitate lower laser transmitter power. A field deployable, hand held prototype sensor for use in remote sensing a appropriate standoff distances can support operational testing. Distance infrared imaging of methane is feasible. Fully characterized real time image of a methane cloud offers operational advantages in accuracy and safety as compared to current sensors.

公开(公告)号：US11714046B2

公开(公告)日：2023-08-01

申请号：US16840941

申请日：2020-04-06

Applicant: Ohio State Innovation Foundation

Inventor： Christopher Ball ,  Theodore Ronningen ,  Douglas Fink ,  Brett Ringel ,  Sanjay Krishna ,  Earl Fuller ,  Douglas Mooney

IPC: G01N21/3504

CPC classification number: G01N21/3504

Abstract: A system and method indicate capability for detecting methane leaks inside buildings. This approach provides the ability to detect methane behind high efficiency coated windows and can extract methane concentration (rather than concentration-path length product CL). Lock-in imaging technologies can facilitate lower laser transmitter power. A field deployable, hand held prototype sensor for use in remote sensing a appropriate standoff distances can support operational testing. Distance infrared imaging of methane is feasible. Fully characterized real time image of a methane cloud offers operational advantages in accuracy and safety as compared to current sensors.

公开(公告)号：US11521994B2

公开(公告)日：2022-12-06

申请号：US16769693

申请日：2018-12-05

Applicant: OHIO STATE INNOVATION FOUNDATION

Inventor： Sanjay Krishna ,  Earl Fuller ,  Waleed Khalil ,  Theodore Ronningen ,  Alireza Kazemi ,  Dale Shane Smith ,  Teressa Specht ,  Ramy Tantawy

IPC: H01L27/146 ,  H01L27/142 ,  H01L31/103 ,  H01L31/108 ,  H03K17/785

Abstract: An open circuit voltage photodetector comprises a photovoltaic device including a photovoltaic junction, and a transistor. The photovoltaic device is connected to the gate terminal of the transistor to input an open circuit voltage of the photovoltaic device to the gate terminal. An array of such photodetectors and a readout integrated circuit forms an image sensor. In a photodetection method, an open circuit voltage is generated in a photovoltaic device in response to illumination by incident radiation, and the open circuit voltage is applied to a gate terminal of a transistor to modulate a channel current flowing in a channel of the transistor. A readout electronic circuit may be fabricated with an extra transistor, and a photovoltaic device disposed on the readout electronic circuit and electrically connected to apply an open circuit voltage of the photovoltaic device to a gate of the extra transistor.

公开(公告)号：US20200319096A1

公开(公告)日：2020-10-08

申请号：US16840941

申请日：2020-04-06

Applicant: Ohio State Innovation Foundation

Inventor： Christopher Ball ,  Theodore Ronningen ,  Douglas Fink ,  Brett Ringel ,  Sanjay Krishna ,  Earl Fuller ,  Douglas Mooney

IPC: G01N21/3504

Abstract: A system and method indicate capability for detecting methane leaks inside buildings. This approach provides the ability to detect methane behind high efficiency coated windows and can extract methane concentration (rather than CL). Lock-in imaging technologies can facilitate lower laser transmitter power. A field deployable, hand held prototype sensor for use in remote sensing a appropriate standoff distances can support operational testing. Distance infrared imaging of methane is feasible. Fully characterized real time image of a methane cloud offers operational advantages in accuracy and safety as compared to current sensors