This study demonstrates multithreshold engineering of a solution-processed heterojunction electrochemical transistor using a blend of n-type CdSe tetrapod-shaped nanocrystals (TpNCs) and an n-type polymeric organic semiconductor (OSC). The unique geometry of TpNCs enables a broad concentration range of charge percolation, where charge transfer between TpNC and OSC domains determines multiple threshold voltages. The OSC domain’s threshold voltage shifts from 1 to −1 V as TpNC content increases, while the TpNC domain maintains a threshold above 1.5 V. This allows for stable intermediate states, crucial for multivalued logic operations. Charge percolation and photoluminescence studies show selective charge redistribution, shifting the threshold voltages in the polymer networks. Ternary logic gates, including TNOT, TNAND, and TNOR, based on these heterojunction transistors, were also demonstrated, highlighting the potential of this approach for advanced logic applications.

本研究展示了使用 n 型 CdSe 四足形纳米晶体 （TpNC） 和 n 型聚合物有机半导体 （OSC） 的混合物对固溶处理异质结电化学晶体管进行多阈值工程。TpNC 的独特几何形状可实现较宽的电荷渗流浓度范围，其中 TpNC 和 OSC 域之间的电荷转移决定了多个阈值电压。随着 TpNC 含量的增加，OSC 域的阈值电压从 1 V 变为 −1 V，而 TpNC 域将阈值保持在 1.5 V 以上。这允许稳定的中间状态，这对于多值 logic 操作至关重要。电荷渗透和光致发光研究表明，选择性电荷再分布，改变了聚合物网络中的阈值电压。此外，还展示了基于这些异质结晶体管的三元逻辑门，包括 TNOT、TNAND 和 TNOR，突出了这种方法在高级逻辑应用中的潜力。