Optoelectronic photoelectrodes based on capacitive charge-transfer offer an attractive route to develop safe and effective neuromodulators. Here, we demonstrate efficient optoelectronic photoelectrodes that are based on the incorporation of quantum dots (QDs) into poly(3-hexylthiophene-2,5-diyl) (P3HT) and [6,6]-Phenyl-C61-butyric acid methyl ester (PCBM) bulk heterojunction. We control the performance of the photoelectrode by the blend ratio, thickness, and nanomorphology of the ternary bulk heterojunction. The optimization led to a photocapacitor that has a photovoltage of 450 mV under a light intensity level of 20 mW.cm⁻² and a responsivity of 99 mA/W corresponding to the most light-sensitive organic photoelectrode reported to date. The photocapacitor can facilitate action potential generation by hippocampal neurons via burst waveforms at an intensity level of 20 mW.cm⁻². Therefore, the results point to an alternative direction in the engineering of safe and ultra-light-sensitive neural interfaces.

中文翻译：

---

通过三元混合光伏优化对神经元进行光刺激的高效光电容器

基于电容性电荷转移的光电光电电极为开发安全有效的神经调节剂提供了一条诱人的途径。在这里，我们演示了基于将量子点（QD）引入聚（3-己基噻吩-2,5-二基）（P3HT）和[6,6]-苯基-C61-丁酸甲酯的量子点的高效光电光电电极。 （PCBM）本体异质结。我们通过三元本体异质结的混合比，厚度和纳米形态来控制光电极的性能。优化导致光电容器在光强度为20 mW.cm ^-2的情况下具有450 mV的光电压响应度为99 mA / W，与迄今报道的最感光的有机光电极相对应。该光电容器可以通过强度为20 mW.cm ^-2的突发波形促进海马神经元产生动作电位。因此，结果指出了安全和超感光神经接口工程的替代方向。