Pseudologic Optical Circuit Method for Advanced Color Sensing in IGZO Phototransistor Arrays with Chlorophyll Absorption Layers

IF 8.3 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Hyunji Son, Dong Hyun Choi, Kyungho Park, Jusung Chung, Byung Ha Kang, Hyun Jae Kim
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Abstract

Recently, the elimination of color filters has become a key focus in photodetector research because of the potential to create more compact and cost-effective sensor systems. In this study, a novel concept of a filter-free color-discrimination photosensor using an indium gallium zinc oxide (IGZO, In/Ga/Zn = 3.1:2.6:1.0)-based phototransistor with an integrated chlorophyll absorption layer (CAL) and a solution-processed oxide absorption layer (SAL) was developed. Chlorophyll, known for its role in photosynthesis as a natural light absorber, offers distinct characteristics compared to conventional photodetectors (i.e., SAL/IGZO), whereby the photoresponsivity decreases with increasing wavelength. Using the ability of chlorophyll to absorb blue and red light, the proposed CAL/IGZO phototransistor exhibited a higher photoresponsivity to red light than to green light. The device achieved a photoresponsivity of 1570 A/W for red light and 681 A/W for green light, with a photosensitivity of 8.35 × 105 and 8.96 × 104 and a detectivity of 8.47 × 1011 and 6.80 × 1010 Jones, respectively, under an illumination intensity of 1 mW/mm2. Furthermore, by integrating the proposed CAL/IGZO phototransistor with a SAL/IGZO phototransistor, which exhibited a different order of photoresponse across RGB wavelengths, an innovative color-discrimination pixel pseudologic circuit was successfully developed. The capability of this circuit to distinguish colors across various light intensities was validated through experimental data and SPICE simulations, with the output voltage ranges confirmed as −2.61 to −3.51 V for red, 1.56 to 2.69 V for green, and −0.22 to −0.68 V for blue over light intensities from 0.1 to 3 mW/mm2. This innovative approach allows effective color detection without conventional color filters, providing an advanced solution for photodetection technologies.

Abstract Image

含叶绿素吸收层的IGZO光电晶体管阵列的高级显色伪光电路方法
近年来,消除彩色滤光片已成为光电探测器研究的一个重点,因为它有可能创造出更紧凑、更经济的传感器系统。在这项研究中,提出了一种新的无滤波器的彩色分辨光敏传感器的概念,该光敏传感器使用铟镓氧化锌(IGZO, In/Ga/Zn = 3.1:2.6:1.0)为基础的光电晶体管,集成了叶绿素吸收层(CAL)和溶液处理的氧化物吸收层(SAL)。叶绿素以其在光合作用中的作用而闻名,与传统的光探测器(即SAL/IGZO)相比,它具有明显的特性,即光响应性随着波长的增加而降低。利用叶绿素吸收蓝光和红光的能力,所提出的CAL/IGZO光电晶体管对红光的光响应性比绿光高。在光照强度为1 mW/mm2的情况下,器件的红光光响应率为1570 a /W,绿光光响应率为681 a /W,光敏度分别为8.35 × 105和8.96 × 104,探测率分别为8.47 × 1011和6.80 × 1010琼斯。此外,通过将所提出的CAL/IGZO光电晶体管与具有不同RGB波长光响应顺序的SAL/IGZO光电晶体管集成,成功地开发了一种创新的彩色分辨像素伪电路。通过实验数据和SPICE模拟验证了该电路在不同光强下区分颜色的能力,在0.1至3 mW/mm2的光强范围内,输出电压范围为红色- 2.61至- 3.51 V,绿色为1.56至2.69 V,蓝色为- 0.22至- 0.68 V。这种创新的方法可以在没有传统滤色器的情况下进行有效的颜色检测,为光检测技术提供了先进的解决方案。
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来源期刊
ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces 工程技术-材料科学:综合
CiteScore
16.00
自引率
6.30%
发文量
4978
审稿时长
1.8 months
期刊介绍: ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.
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