Optical Functional Device With Reduced Emission-Sensitivity Overlap
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Solution Overview
Problem
Existing optical functional devices, functional panels, display devices, input/output devices, and data processing devices lack convenience, reliability, and efficiency in their light-emitting and photoelectric conversion functions, particularly in reducing overlap between emission spectra and spectral sensitivity characteristics.
Innovation Solution
Incorporating a light-emitting function, photoelectric conversion function, first and second electrodes, and an optical functional layer with specific emission and absorption spectra configurations, including layers with light-emitting and light-absorbing materials, to minimize overlap and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the emission spectrum and spectral sensitivity characteristic have significant overlap, then photoelectric conversion efficiency is improved, but light emission efficiency deteriorates due to re-absorption of emitted light
Solution Approach 1:
The device is divided into two functionally independent regions: a light emission region containing light-emitting material and a photoelectric conversion region containing light-absorbing material. This spatial segmentation allows each region to perform its function without interference, resolving the contradiction between photoelectric conversion efficiency and light emission efficiency by preventing re-absorption of emitted light in the photoelectric conversion region
Solution Approach 2:
Different regions of the optical functional layer are assigned different material properties: the light emission region uses materials with specific emission spectra, while the photoelectric conversion region uses materials with absorption spectra optimized for detecting emitted light. This local differentiation of material qualities enables simultaneous optimization of both light emission and photoelectric conversion functions without mutual interference
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables efficient light emission and photoelectric conversion, providing highly convenient, useful, and reliable optical functional devices and panels, capable of applications such as biosensors and display devices.
Implementation Method 1
a light-emitting function, which converts electrical energy into first light
Implementation Method 2
a photoelectric conversion function, which has a spectral sensitivity characteristic
Implementation Method 3
the light-absorbing material has a first absorption spectrum
Data Source
AI summary
A novel optical functional device that is highly convenient, useful, or reliable is provided. The optical functional device includes a light-emitting function, a photoelectric conversion function, a first electrode, a second electrode, and an optical functional layer. The light-emitting function converts electrical energy into first light, the first light has a first emission spectrum, and the first emission spectrum exhibits a maximum peak at a first wavelength. At a second wavelength, the intensity of the first emission spectrum is 80% of the maximum peak. The photoelectric conversion function has a spectral sensitivity characteristic; at a third wavelength, the spectral sensitivity characteristic has a maximum sensitivity within a range of 420 to 720 nm inclusive; and at a fourth wavelength, the sensitivity of the spectral sensitivity characteristic is 80% of the maximum sensitivity. The third wavelength is positioned closer to the second wavelength than to the first wavelength, and the fourth wavelength is positioned closer to the first wavelength than to the third wavelength.