Drain C M, Christensen B, Mauzerall D
Rockefeller University, New York, NY 10021.
Proc Natl Acad Sci U S A. 1989 Sep;86(18):6959-62. doi: 10.1073/pnas.86.18.6959.
Photoformation of metalloporphyrin cations in a lipid bilayer increases the ionic currents of negative and decreases those of positive hydrophobic ions. At low concentrations of the mobile hydrophobic ion, a 30% change in conductivity is observed that decreases with increasing concentration of positive tetraphenylphosphonium ion and increases drastically with increasing concentration of negative tetraphenylboride ion. In the region of saturated conductance of boride ion, the increase in conductivity is 3.6-fold. A 15-fold increase is observed with the protonophore carbonyl cyanide 3-chlorophenylhydrazone. In this case the net charge gated is 300 times greater than the photogenerated charge in the bilayer membrane. Thus there is a net gain in this organic field effect phototransistor. The gating can also be accomplished by continuous light or chemical oxidants. Photogating is explained as space charge effects inside the bilayer.
脂质双层中金属卟啉阳离子的光形成增加了负性疏水离子的离子电流，降低了正性疏水离子的离子电流。在可移动疏水离子浓度较低时，观察到电导率有30%的变化，该变化随正性四苯基鏻离子浓度的增加而减小，随负性四苯基硼离子浓度的增加而急剧增大。在硼离子饱和电导区域，电导率增加了3.6倍。质子载体羰基氰化物3-氯苯腙可使电导率增加15倍。在这种情况下，门控的净电荷比双层膜中光生电荷大300倍。因此，这种有机场效应光电晶体管有净增益。门控也可以通过持续光照或化学氧化剂来实现。光门控被解释为双层内部的空间电荷效应。
