热点论文带您领略光电半导体领域的最新进展——图书馆前沿文献专题推荐服务（50）

2021-11-08

 

        集成电路已经进入2nm时代，纯电子学架构在物理上必然限制集成电路的持续发展，“光电融合”为集成电路的技术革新提供了新思路。
       在本期的文献推荐中，关注点着眼于光电半导体领域的最新进展，包括：用于下一代数据通信的新兴发光二极管，具有视觉适应能力的光电晶体管，三维可折叠量子点发光二极管，以及光强依赖的主动光适应有机晶体管。供相关领域的科研人员参考。
领域一 用于下一代数据通信的新兴发光二极管
Emerging light-emitting diodes for next-generation data communications
Aobo Ren, etc.
Nature Electronics, 2021, 4: 559- 572
The continuing development of consumer electronics, mobile communications and advanced computing technologies has led to a rapid growth in data traffic, creating challenges for the communications industry. Light-emitting diode (LED)-based communication links are of potential use in both free space and optical interconnect applications, and LEDs based on emerging semiconductor materials, which can offer tunable optoelectronics properties and solution-processable manufacturing, are of particular interest in the development of next-generation data communications. Here we review the development of emerging LED materials—organic semiconductors, colloidal quantum dots and metal halide perovskites—for use in optical communications. We examine efforts to improve the modulation performance and device efficiency of these LEDs, and consider potential applications in on-chip interconnects and light fidelity (Li-Fi). We also explore the challenges that exist in developing practical high-speed LED-based data communication systems.
 
领域二 具有视觉适应能力的光电晶体管
A phototransistor with visual adaptation
Jiansheng Jie, etc.
Nature Electronics, 2021, 4: 460-461
An organic phototransistor with two complementary bulk heterojunctions exhibits light-intensity-dependent adaptation behaviour that mimics the behaviour of the human visual system.

                                                                                   Fig. Organic phototransistor with active visual adaptation
领域三 三维可折叠量子点发光二极管
Three-dimensional foldable quantum dot light-emitting diodes
Dong Chan Kim, etc.
Nature Electronics, 2021, 4: 671-680
Flexible light-emitting devices that can transform from two-dimensional to three-dimensional (3D) forms could be of use in the development of next-generation displays. Various approaches for converting two-dimensional structures into 3D architectures have been explored, including origami methods that rely on folding along lines in which a structure has been thinned. But the fabrication of foldable 3D light-emitting devices remains challenging due, in particular, to the lack of a practical method for patterning the folding lines. Here we show that 3D foldable quantum dot light-emitting diodes (QLEDs) can be created using laser patterning and metal etch-stop layers with customized ablation thresholds. The approach allows etching to be limited to selected layers of the multilayered QLEDs, and it can be precisely tuned by using alloy-type etch-stop layers. The approach can be used to create QLED architectures with extremely small bending radii (0.047 mm), and we illustrate its capabilities by fabricating a 3D foldable passive matrix array of QLEDs that can display letters and numbers.

                                          Fig. Dynamic 2D–3D transformation of the foldable PM QLED array
 领域四 光强依赖的主动光适应有机晶体管
An organic transistor with light intensity-dependent active photoadaptation
Zihan He, etc.
Nature Electronics, 2021, 4: 522-529
The development of artificial visual systems that mimic biological systems requires devices that can autonomously adapt their response to varying stimuli. However, emulating biological feedforward visual adaptation is challenging and requires complementary photoexcitation and inhibition, ideally in a single device. Here we show that an organic transistor that incorporates two bulk heterojunctions is capable of light intensity-dependent active photoadaptation. The approach couples the photovoltaic effect in bulk heterojunctions with electron trapping in the dielectric layer, allowing adaptive modulation of the carrier concentration of the transistor. Our device exhibits active photoadaptation behaviour for light intensities ranging over six orders of magnitude (1 to 10⁶cd m⁻²). We also define an active adaptation index to describe the luminance-dependent changes to sensitivity, including auto-background control, which for our devices is comparable to that of the human visual system (less than 2 s at 1 × 10⁴ cd m⁻²).

                                                   Fig. Visual adaptation in bioreceptors and a bioinspired OAAT

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