A memory effect controlled by a pulsed voltage in photoinduced conductivity switching in an organic charge-transfer salt.
A memory effect controlled by a pulsed voltage in photoinduced conductivity switching in an organic charge-transfer salt.
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DOI：
10.1021/ja068791d
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发表时间：
2007-03
影响因子：
15
通讯作者：
Toshifumi Iimori;T. Naito;N. Ohta
中科院分区：
文献类型：
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作者：
Toshifumi Iimori;T. Naito;N. Ohta
本文报道了有机电荷转移盐α-（BEDT-TTF）_2I_3在脉冲电压和同步光照射下产生的光诱导高电导（HC）态，在脉冲电压作用下，即使电流降到零，也能在不进一步光照射的情况下重复恢复。可以通过调整脉冲宽度和/或幅度来控制到HC状态的恢复。通过适当选择脉冲电压参数，可以使开关可逆或不可逆。电路的电流-电压和电流-辐照强度曲线中的滞后环表明了在非常规光开关操作中具有潜在应用的记忆效应。通过改变脉冲电压的宽度，可以灵活地改变磁滞回线和电流双稳特性。
We report that the photoinduced high conductivity (HC) state in the organic charge-transfer salt α-(BEDT-TTF)2I3, which is initially triggered by a pulsed voltage and synchronous photoirradiation, can be repeatedly recovered without further photoirradiation by application of a pulsed voltage even after the current has been reduced to zero. The recovery to the HC state can be controlled by adjusting the pulse width and/or amplitude. By proper selection of pulsed voltage parameters, the switching can be made reversible or irreversible. Hysteresis loops in the current−voltage and current−irradiation intensity curves of the circuit demonstrate a memory effect with potential application in unconventional photoswitching operations. The characteristic of the hysteresis loop and current bistability can be flexibly varied by changing the width of the applied pulsed voltage.