Size-Independent Reconfigurable Logic Gate with Bismuth Oxide Based Photoelectrochemical Device.
Size-Independent Reconfigurable Logic Gate with Bismuth Oxide Based Photoelectrochemical Device.
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DOI：
10.1021/jacs.2c13873
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发表时间：
2023-02
影响因子：
15
通讯作者：
Boheng Dong;Xinya Zhang;Xiang Jiang;Fuxian Wang
中科院分区：
文献类型：
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作者：
Boheng Dong;Xinya Zhang;Xiang Jiang;Fuxian Wang
异或门是计算电路中的一个重要组成部分，它往往是由其他基本逻辑门组合而成，其混杂性必然导致其复杂性。光电化学装置可以基于光电极的电流变化实现XOR功能;然而，这种信号对光电极尺寸高度敏感，因此需要高成本的精密制造。在此，我们开发了一种新的异或门的基础上的光致开路电位（OCP）的Bi 2 O3光电极。令人惊讶的是，根据传统的对数关系，Bi 2 O3的OCP不随光强度增加。相反，在高的光强度下观察到一个不寻常的OCP减少，这是由于在反应磁控溅射过程中，可以很容易地通过改变氧分压调节的表面状态的戏剧性的光诱导的增加。基于OCP的这种非单调变化，设计了一种简单的Bi 2 O3基门电路来实现异或功能。与通常使用的电流信号不同，OCP与尺寸无关，因此，基于Bi 2 O3的栅极不需要高制造精度。此外，除了XOR之外，基于Bi 2 O3的PEC门还在实现其他逻辑功能方面表现出很大的通用性，包括AND，OR，NOT，NIH，NAND和NOR。非单调OCP信号的调制和应用策略为低成本设计与尺寸无关的可重构逻辑门开辟了一条新的途径。
XOR gate, an important building block in computational circuits, is often constructed by combining other basic logic gates, and the hybridity inevitably leads to its complexity. A photoelectrochemical device could realize XOR function based on the current change of the photoelectrode; however, such signal is highly sensitive to photoelectrode size and therefore requires precise manufacturing at a high cost. Herein we developed a novel XOR gate based on the light-induced open-circuit potential (OCP) of the Bi2O3 photoelectrode. Surprisingly, the OCP of Bi2O3 does not increase with light intensity according to the traditional logarithmic relationship. Instead, an unusual decrease in OCP is observed at high light intensity, which is attributed to the dramatic light-induced increase in surface states that can be easily regulated by varying the oxygen partial pressure during reactive magnetron sputtering. Based on such a nonmonotonic variation of OCP, a facile Bi2O3-based gate is designed to realize the XOR function. Unlike the commonly used current signal, OCP is size independent, and therefore, the Bi2O3-based gate does not require high manufacturing accuracy. Moreover, in addition to XOR, the Bi2O3-based PEC gate also demonstrates great versatility in realizing other logic functions including AND, OR, NOT, NIH, NAND, and NOR. The strategy of modulating and applying nonmonotonic OCP signal opens a new avenue for designing size-independent reconfigurable logic gates at low manufacturing cost.