All-in-One Optoelectronic Logic Gates Enabled by Bipolar Spectral Photoresponse of CdTe/SnSe Heterojunction.
All-in-One Optoelectronic Logic Gates Enabled by Bipolar Spectral Photoresponse of CdTe/SnSe Heterojunction.
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DOI：
10.1021/acsami.3c04541
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发表时间：
2023-06
影响因子：
9.5
通讯作者：
Guanchu Liu;Fuhai Guo;Mingcong Zhang;Yunjie Liu;Jingyi Hao;Weizhuo Yu;Siqi Li;Bing Hu;Bo Zhang;L. Hao
中科院分区：
文献类型：
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作者：
Guanchu Liu;Fuhai Guo;Mingcong Zhang;Yunjie Liu;Jingyi Hao;Weizhuo Yu;Siqi Li;Bing Hu;Bo Zhang;L. Hao
光电逻辑门器件（OLGDs）在高密度信息处理器中引起了人们的广泛关注;然而，由于单向电传输，单个器件中的多功能逻辑操作在技术上具有挑战性。在这项工作中，我们故意设计的所有在一个OLGD的基础上自供电的CdTe/SnSe异质结光电探测器。SnSe纳米棒（NR）阵列通过掠射角沉积技术生长在溅射的CdTe薄膜上以形成异质结器件。在界面处，CdTe/SnSe异质结中的光伏（PV）效应和SnSe NR的光热电（PTE）效应结合在一起以诱导反向光电流，从而导致独特的双极光谱响应。因此，在不同光谱范围内的PV和PTE之间的竞争被用来控制光电流极性，并且仅用单个异质结就可以执行OR、AND、NAND、NOR和NOT五个基本逻辑门。我们的研究结果表明CdTe/SnSe异质结作为下一代传感计算系统中的逻辑单元的巨大潜力。
Optoelectronic logic gate devices (OLGDs) have attracted significant attention in high-density information processors; however, multifunctional logic operation in a single device is technically challenging due to the unidirectional electrical transport. In this work, we deliberately design all-in-one OLGDs based on self-powered CdTe/SnSe heterojunction photodetectors. The SnSe nanorod (NR) array is grown on the sputtered CdTe film via a glancing-angle deposition technique to form a heterojunction device. At the interface, the photovoltaic (PV) effect in the CdTe/SnSe heterojunction and the photothermoelectric (PTE) effect from the SnSe NRs are combined together to induce the reversed photocurrent, leading to a unique bipolar spectral response. The competition between PV and PTE in different spectral ranges is thus employed to control the photocurrent polarity, and five basic logic gates of OR, AND, NAND, NOR, and NOT can be performed just with a single heterojunction. Our findings indicate the large potentials of the CdTe/SnSe heterojunctions as logic units in next-generation sensing-computing systems.