365nm台式紫外线灯用于光刺激实验

近日西安交通大学发表文献《Boosting the charge injection of polymer electrets for light-stimulated artificial synaptic transistors》，文献中采用LUYOR-3405可调光强度的台式紫外线灯进行紫外辐照。

文献摘要：

增强光刺激人工突触晶体管的聚合物驻极体的电荷注入

半导体/聚合物驻极体结构广泛应用于有机场效应晶体管、存储器和人工突触。由于能级不同，激子分离效率和从半导体到绝缘聚合物的电荷注入仍然存在挑战。在这项工作中，我们提出了一种有效的方法来提高电荷注入效率，从而改善光学响应，通过在p-型半导体和驻极体层。例如，40 nm 2,7-二辛基[1]苯并噻吩并[3,2- b ]苯并噻吩 (C 8 -BTBT)/2 nm C 8 -PTCDI/聚合物驻极体基突触晶体管表现出 5.6 × 的优异光敏度10 6与其他晶体管相比。 C 8 -PTCDI不仅充当电子受体以改善激子解离并增加光生电荷浓度，而且还在通道中提供电子传输层以将电子注入PS中。为了验证其普适性，还制备了40 nm C 8 -BTBT/2 nm [6,6]-苯基-C71-丁酸甲酯（PC 71 BM）/聚合物驻极体突触晶体管，光敏度高达1.4 × 10 6 . 此外，利用C 8 -BTBT/C 8 -PTCDI/聚合物驻极体的配置，制造了光刺激人工突触晶体管，并将其用于“小狗”图片学习、神经网络计算和图像识别任务（识别率高达至 98.3%）。

Semiconductor/polymer electret constructions are extensively utilized in organic field-effect transistors, memories, and artificial synapses. The challenge of exciton separation efficiency and charge injection from semiconductors into insulating polymers persist due to their disparate energy levels. In this work, we propose an effective method to enhance charge injection efficiency, thereby improving the optical response, by incorporating N,N′-dioctyl-3,4,9,10-perylenetetracarboxylic diimide (C8-PTCDI) between the p-type semiconductor and the electret layer. For example, the 40 nm 2,7-diocty[1]benzothieno[3,2-b]benzothiophene (C8-BTBT)/2 nm C8-PTCDI/polymer electret-based synaptic transistors show a superior photosensitivity of 5.6 × 106, compared with other transistors. C8-PTCDI not only acts as an electron acceptor to improve the exciton dissociation and increase the photo-induced charge concentration, but also provides an electron transport layer in the channel for electron injection into PS. To verify its universality, 40 nm C8-BTBT/2 nm [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM)/polymer electret synaptic transistors were also prepared with a photosensitivity of up to 1.4 × 106. Moreover, utilizing a configuration of C8-BTBT/C8-PTCDI/polymer electrets, light-stimulated artificial synaptic transistors were fabricated and employed in “pup” picture learning, neural network computing and image recognition tasks (achieving a recognition rate of up to 98.3%).

Light illumination

The light source was provided by using a portable LUYOR-3405 UV LAMP with adjustable light intensity. The solar power meter (model LH-122) used in this work measures light intensity with a spectral response range of 400–1100 nm and a resolution of 1 μW cm−2.

Journal of Materials Chemistry C ( IF 5.7 ) 

Pub Date : 2024-08-14 , 

文献地址：DOI: 10.1039/d4tc02706j