School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore.
ACS Appl Mater Interfaces. 2017 Sep 27;9(38):33212-33219. doi: 10.1021/acsami.7b06135. Epub 2017 Sep 13.
Photovoltaic effects in poly(3-hexylthiophene-2,5-diyl) (P3HT) have attracted much attention recently. Here, natively p-type doped P3HT nanofibers and n-type doped zinc tin oxide (ZTO) nanowires are used for making not only field-effect transistors (FETs) but also p-n nanoscale diodes. The hybrid P3HT/ZTO p-n heterojunction shows applications in many directions, and it also facilitates the investigation of photoelectrons and photovoltaic effects on the nanoscale. As for applications, the heterojunction device shows a simultaneously high on/off ratio of n- and p-type FETs, gatable p-n junction diodes, tristate buffer devices, gatable photodetectors, and gatable solar cells. On the other hand, P3HT nanofibers are taken as a photoactive layer and the role played by the p-n heterojunction in the photoelectric and photovoltaic effects is investigated. It is found that the hybrid P3HT/ZTO p-n heterojunction assists in increasing photocurrents and enhancing photovoltaic effects. Through the controllable gating of the heterojunction, we can discuss the background mechanisms of photocurrent generation and photovoltaic energy harvesting.
聚（3-己基噻吩-2,5-二基）（P3HT）中的光伏效应最近引起了广泛关注。在这里，本征 p 型掺杂的 P3HT 纳米纤维和 n 型掺杂的锌锡氧化物（ZTO）纳米线不仅用于制造场效应晶体管（FET），还用于制造 p-n 纳米级二极管。混合 P3HT/ZTO p-n 异质结在许多方面具有应用前景，也便于在纳米尺度上研究光电子和光伏效应。就应用而言，该异质结器件同时表现出 n 型和 p 型 FET 的高开关比、可栅控的 p-n 结二极管、三态缓冲器件、可栅控光电探测器和可栅控太阳能电池。另一方面，将 P3HT 纳米纤维用作光活性层，并研究 p-n 异质结对光电和光伏效应的作用。结果发现，混合 P3HT/ZTO p-n 异质结有助于增加光电流并增强光伏效应。通过对异质结的可控栅控，我们可以讨论光电流产生和光伏能量收集的背景机制。
