Polymer space-charge-limited transistor as a solid-state vacuum tube triode

Yu Chiang Chao, Ming Che Ku, Wu Wei Tsai, Hsiao-Wen Zan*, Hsin-Fei Meng, Hung Kuo Tsai, Sheng Fu Horng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


We report the construction of a polymer space-charge-limited transistor (SCLT), a solid-state version of vacuum tube triode. The SCLT achieves a high on/off ratio of 3× 105 at a low operation voltage of 1.5 V by using high quality insulators both above and below the grid base electrode. Applying a greater bias to the base increases the barrier potential, and turns off the channel current, without introducing a large parasitic leakage current. Simulation result verifies the influence of base bias on channel potential distribution. The output current density is 1.7 mA/ cm2 with current gain greater than 1000.

Original languageEnglish
Article number223307
JournalApplied Physics Letters
Issue number22
StatePublished - 29 Nov 2010


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