Solution-processed near-infrared phototransistor based on ultrathin nanocrystals of octamethyl substituted zinc(II) phthalocyanine

Shan, Haiquan; Wang, Yulong; Li, Chen; Hu, Qikun; Sun, Xize; Dong, Lei; Feng, Yaomiao; Ye, Wenkang; Xu, Jie; Xu, Zong‐Xiang

doi:10.1016/j.orgel.2018.04.023

Cited by 14 publications

(8 citation statements)

References 31 publications

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“…Most visible‐light OPTs operate on relatively high voltages to deliver high R and D *, whereas F 16 CuPc nanoflake‐based OPT with vdW contact shows superior performance to most visible‐light OPTs even at a very low operating voltage ( V ds = 1 V), which offers new opportunities for emerging photodectectors. [ 41,57–67 ]…”

Section: Resultsmentioning

confidence: 99%

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Hao

Qin

et al. 2021

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2D organic crystals exhibit efficient charge transport and field‐effect characteristics, making them promising candidates for high‐performance nanoelectronics. However, the strong Fermi level pinning (FLP) effect and large Schottky barrier between organic semiconductors and metals largely limit device performance. Herein, by carrying out temperature‐dependent transport and Kelvin probe force microscopy measurements, it is demonstrated that the introducing of 2D metallic 1T‐TaSe2 with matched band‐alignment as electrodes for F16CuPc nanoflake filed‐effect transistors leads to enhanced field‐effect characteristics, especially lowered Schottky barrier height and contact resistance at the contact and highly efficient charge transport within the channel, which are attributed to the significantly suppressed FLP effect and appropriate band alignment at the nonbonding van der Waals (vdW) hetero‐interface. Moreover, by taking advantage of the improved contact behavior with 1T‐TaSe2 contact, the optoelectronic performance of F16CuPc nanoflake‐based phototransistor is drastically improved, with a maximum photoresponsivity of 387 A W−1 and detectivity of 3.7 × 1014 Jones at quite a low Vds of 1 V, which is more competitive than those of the reported organic photodetectors and phototransistors. The work provides an avenue to improve the electrical and optoelectronic properties of 2D organic devices by introducing 2D metals with appropriate work function for vdW contacts.

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Section: Resultsmentioning

confidence: 99%

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Hao

Qin

et al. 2021

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“…Metal phthalocyanines (MPcs), as one of the classic π‐conjugated organic small molecules, show great potential in photo detection, owing to their non‐toxicity, thermal and chemical stability, as well as easy structural modification . In particular, the Q‐band absorption makes them attractive in red light harvesting.…”

Section: Recent Progress In Optsmentioning

confidence: 99%

“…To date, there are a fewer reports on n‐type OPTs because of the low carrier mobility and instability of n‐type organic small molecule materials. However, n‐type OPTs are also important to next‐generation flexible computed logical circuits . One of the typical high‐performance n‐type organic small molecules is N,N′‐bis(2‐phenylethyl)‐perylene‐3,4 : 9,10‐tetracarboxylic diimide (BPE−PTCDI).…”

Section: Recent Progress In Optsmentioning

confidence: 99%

Recent Progress in Organic Phototransistors: Semiconductor Materials, Device Structures and Optoelectronic Applications

Huang

Fuchs

et al. 2019

ChemPhotoChem

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Phototransistors combine light detection and signal amplification functions into a single device and are regarded as one of the most important components for optoelectronic integration. In recent years, organic phototransistors (OPTs) have attracted worldwide interest because of their potential advantages of low cost, light weight, excellent flexibility and broadband detection. In this review, a brief description of the working mechanisms and performance metrics of OPTs is presented. Afterwards, the recent progress of OPTs based on the conventional planar fieldeffect transistor structure is presented. Furthermore, from the perspective of novel device architectures and interface engineering, strategies for improving the performance of OPTs are discussed. Flexible optoelectronic devices based on OPTs for potential application in next-generation wearable and humanfriendly electronics are also highlighted. Finally, an outlook for future research directions and challenges for OPTs is provided.

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“…The use of organic field-effect transistors (OFETs) as photosensors has become more and more popular since the early examples proposed by Narayan et al and Saragi et al The phototransistor performance is commonly quantified by the photosensitivity ( P = ( I light – I dark )/ I dark ) and photoresponsivity ( R = ( I light – I dark )/ P opt ), where I light and I dark are the drain current values under illumination and in the dark respectively, while P opt is the power of incident light. , During the last years, the OPT performance has continuously improved, triggered by the design of novel OSCs, − device architectures, ,,,− and interface engineering. ,,, For instance, Ji et al demonstrated a high-performance OPT based on a 2,6-diphenylanthracene (DPA) thin film, exhibiting high mobility (∼7.5 cm 2 V –1 s –1 ) and remarkable optical performance parameters ( P = 8.5 × 10 7 and R = 1.34 × 10 5 A W –1 ) that are comparable and even superior to that of inorganic counterparts . The reported phototransistors relied on the highly crystalline nature of the DPA thin film obtained by vacuum deposition.…”

Section: Introductionmentioning

confidence: 99%

Pushing On-Chip Photosensitivity Forward Using Edge-Driven Vertical Organic Phototransistors

Andrade

Merces

Nawaz

et al. 2023

ACS Appl. Electron. Mater.

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Developing high-performance photosensors using prototype device architectures is essential to pushing forward developing and advancing next-generation optoelectronic applications. This work reports an organic phototransistor (OPT) with an ultra-short conducting channel (tens of nanometers) and outstanding photoelectric conversion efficiency. The OPT is based on a vertical organic field-effect transistor (VOFET) architecture, which utilizes a rolled-up metallic nanomembrane (NM) as the drain electrode and a photolithographically patterned (rectangular-shaped) perforated source electrode. These features expand the concept of conventional VOFETs as the former enables the incorporation of ultra-thin active layers and allows reliable control over gate-induced modulation of channel current. Using the engineering as abovementioned strategies, we focused on obtaining an improved device performance, studying their fundamental operating principle, and further investigating their application as photosensors. The optimized devices exhibited low operating voltages (<5 V) and enhanced on/off current ratio (∼105). The VOFET photoresponse was characterized by measuring the electrical characteristics in the dark and under illumination using three different monochromatic light colors. Under blue light, our devices demonstrated impressive photosensitivity (P max ≈ 105) and fast photoelectric conversion (steep light-induced threshold voltage shift), demonstrating that the rolled-up NM OPT shows excellent potential as a highly sensitive photodetector with low power consumption.

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Solution-processed near-infrared phototransistor based on ultrathin nanocrystals of octamethyl substituted zinc(II) phthalocyanine

Cited by 14 publications

References 31 publications

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Recent Progress in Organic Phototransistors: Semiconductor Materials, Device Structures and Optoelectronic Applications

Pushing On-Chip Photosensitivity Forward Using Edge-Driven Vertical Organic Phototransistors

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Solution-processed near-infrared phototransistor based on ultrathin nanocrystals of octamethyl substituted zinc(II) phthalocyanine

Cited by 14 publications

References 31 publications

Lowering the Contact Barriers of 2D Organic F16CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Lowering the Contact Barriers of 2D Organic F16CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Recent Progress in Organic Phototransistors: Semiconductor Materials, Device Structures and Optoelectronic Applications

Pushing On-Chip Photosensitivity Forward Using Edge-Driven Vertical Organic Phototransistors

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Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts

Lowering the Contact Barriers of 2D Organic F₁₆CuPc Field‐Effect Transistors by Introducing Van der Waals Contacts