Details

Autor(en) / Beteiligte

• Dong, W. S
• Zeng, F
• Lu, S. H
• Li, X. J
• Chang, C. T
• Liu, A
• Pan, F
• Guo, D

Titel

Effect of heavy-ion on frequency selectivity of semiconducting polymer/electrolyte heterojunction

Ist Teil von

• RSC advances, 2015-01, Vol.5 (119), p.9811-98117

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Heavy ion Nd 3+ is introduced into the electrolyte layer to study frequency selectivity of a semiconducting polymer/electrolyte double-layer cell. This cell exhibits long-term depression under low-frequency stimulations and potentiation under high-frequency stimulations by positive triangular pulses, suggesting a conventional learning protocol, i.e. , spike-rate-dependent plasticity. The frequency selectivity depends significantly on the input shape due to large ionic size and mass. The input threshold of the frequency selectivity is around the voltage inducing a negative differential resistance ( V NDR ) influenced by the loading rate. The typical value of V NDR is 0.3 V for a loading rate of 100 V s −1 , but V NDR disappears when the loading rate exceeds 1000 V s −1 . Besides, the frequency selectivity has not been observed under rectangular pulse input. Moreover, the possibility of bidirectional signal transfer has been tested simply by anti-connecting two individual cells. Our study suggests the possibility to realize signal pruning and synthetizing by changing ionic types. Long-term bidirectional frequency selectivity has been achieved in MEH-PPV/PEO-Nd 3+ cells, which suggests spike-rate-dependent plasticity learning protocol. It depends on pulse shape due to variation of ionic type.