Organic field-effect transistors (OFETs) have attracted considerable attention for their promising applications in flexible electronics and biosensing. However, the realization of a low-cost, stable, and integration-compatible device architecture for OFETs still poses a significant challenge. Herein, we propose a low-cost and facile strategy for improving OFET stability by modifying silver (Ag) electrodes with carbon dots (CD) via plasma-enhanced chemical vapor deposition (PECVD). The mobility of coplanar pentacene OFETs with CD-Ag electrodes can be comparable to that of staggled pentacene FETs with Au electrodes, while significantly reducing material costs and improving compatibility with integration-friendly fabrication processes. The improved electrical performance was attributed to the reduced contact resistance and the promotion of dense crystalline domain growth on the CDs-Ag electrodes. Furthermore, the electrical properties of CD-Ag pentacene OFETs show negligible degradate after 180 days of storage, demonstrating the influence of electrodes on the stability of OFETs and effective stabilization effect of CDs-Ag electrode strategy. This electrode modification strategy offers the advantages of simplicity, efficiency, and low processing temperature, offering a promising pathway for large-area fabrication of stable OFETs.