Transparent photovoltaic window for visible light communications with onsite power and reliable machine learning features

Patel, Malkeshkumar; Bhatnagar, P. K.; Lee, Junsik; Kumar, Naveen; Nguyen, Thanh Tai; Kim, Sangho

doi:10.1016/j.nanoen.2023.108696

Cited by 12 publications

(7 citation statements)

References 58 publications

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“…The cut‐off frequency ( f ‐3,dB ) is defined as the point at which the output of the detector decreases by 3 dB and is used to evaluate the actual bandwidth of the devices (Figure S5, Supporting Information), which is determined by evaluating the dynamic response across different light modulation frequencies. [ 41,42 ] The device processed with IC‐Br shows a cut‐off frequency of over 10 5 Hz, which is relatively high compared with the control device with a cut‐off frequency below 10 5 Hz. This result demonstrates that incorporating IC‐Br enhances LDR and response, resulting in improved device functionality for hands‐on applications in comparison to the control device.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Fibrillar Network and Molecular Crystallization via Volatile Solid Additives Enable Efficient Near‐Infrared Organic Photodetectors

Quan,

Wu,

Fink

et al. 2023

Advanced Optical Materials

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Controlling the phase separation and domain purity of organic semiconductors to form well‐developed nanoscale morphology optimization in the bulk‐heterojunction active layer is critical yet challenging for building high‐performance organic photodetectors. Herein, an effective morphology controlling method by applying a small molecule IC‐Br as the solid additive is demonstrated, which can effectively restrict the overmix of the PTzBI‐Si:IEICO‐4F in the process of film formation. The film processed with IC‐Br formed well‐developed nanoscale phase separation with bi‐continuous interpenetrating networks, which exhibited enhanced π–π stacking and the improved domain purity of the IEICO‐4F phase, resulting in a significant decrease in the density of the trap state compared to the pristine film. Consequently, the device processed with IC‐Br additive enabled a high specific detectivity of 3.8 × 1013 Jones at 860 nm under −0.1 V associated with the improved linear dynamic range and response speed, indicating the strong visible‐to‐near infrared detecting capability and potential for practical applications. The morphology optimization strategy established in this work may offer unprecedented opportunities to build state‐of‐the‐art OPDs.

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Section: Resultsmentioning

confidence: 99%

Enhanced Fibrillar Network and Molecular Crystallization via Volatile Solid Additives Enable Efficient Near‐Infrared Organic Photodetectors

Quan,

Wu,

Fink

et al. 2023

Advanced Optical Materials

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“…Although the operating speed of the IOC system is much slower compared to optical communication system based on traditional inorganic semiconductor or perovskite PDs and LEDs/laser diodes systems, [49,50] our IOC system still has high potential to be employed in fields requiring relatively low-speed optical communication and semitransparent properties. Such fields include the Internet of Things (IoT), [51] smart windows, [4,5] VR headsets/glasses, and head-up-display (HUD) integrations. [44]…”

Section: Applications Demonstration Of the Opdsmentioning

confidence: 99%

“…[1,2] The visible see-through property of OPDs enables their integration with other electronic devices, creating well-integrated optical sensing systems for applications like augmentation reality (AR) virtual reality (VR) headsets/glasses, head-up-displays (HUD), touchless screens or smart windows. [3][4][5] In addition, with the rapid development of remote sensing and imaging techniques, there is a growing need to incorporate multiple photo-sensing modules into a single system to gather more information from the target. For instance, drones used in agriculture monitoring require both multispectral imaging and compact size.…”

Section: Introductionmentioning

confidence: 99%

Semitransparent Near‐Infrared Organic Photodetectors: Flexible, Large‐Area, and Physical‐Vapor‐Deposited for Versatile Advanced Optical Applications

Wang,

Zhang,

Samigullina

et al. 2024

Adv Funct Materials

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Organic photodetectors (OPDs) have experienced remarkable performance improvements over the past decade thanks to significant advancements in organic material synthesis and device architecture engineering. In this study, high‐performance near‐infrared (NIR) OPDs with versatile advanced properties, including large detection areas, mechanical flexibility, and high transparency are realized. By incorporating a thin photo‐absorbing layer, functional blocking layers with a large energy gap, and semitransparent electrodes, the OPDs achieve an average visible transmittance (AVT) of up to 53.4% and color rendering index (CRI) of up to 95 within the human vision photopic response window of 380–780 nm. Both the small (6.44 mm2) and large (256 mm2) detection‐area semitransparent OPDs demonstrate an impressive external quantum efficiency (EQE) of 34% and 36%, and specific detectivity (D*) of 1.4 × 1013 and 1.1 × 1012 Jones, respectively, comparable to silicon‐based inorganic photodetectors. As application demonstrations, OPDs with rigid and flexible substrates are employed for NIR imaging and biosensing, respectively. Notably, the flexible semitransparent OPDs are utilized as signal receivers in conjunction with semitransparent NIR organic light‐emitting diodes (OLEDs) operating as signal producers, demonstrating the feasibility of invisible optical communication. These OPDs represent the best‐performing see‐through devices with flexibility, making them promising candidates for integratable, bio‐compatible, and invisible optical‐sensing applications.

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“…Fast-growing industries, such as smart houses, the internet of things (IoT), and self-driving cars, call for the development of easy-to-integrate bifacial photodetectors for electrochromic and energy harvesting windows/mirrors, self-sustaining outdoor/indoor IoT, color discriminating devices, machine vision systems, etc. − Typical bifacial PPDs reported in the literature are fabricated by sandwiching devices between two glass substrates with transparent conducting oxide (TCO) layers such as fluorine-doped or indium-doped tin oxide (FTO or ITO, respectively). − Alternatively, bifaciality in devices is achieved by replacing the top metallic contacts with a sputtered/evaporated TCO layer. , Regardless of the method used to achieve bifaciality, TCO glass substrates used in the fabrication of bifacial PPDs create a bottleneck in terms of their scalability, robustness, and weight. Additionally, TCO glass substrates are not cheap and can be difficult to integrate and/or transport due to their rigid, fragile, and heavy nature …”

Section: Introductionmentioning

confidence: 99%

Self-Powered Printed Flexible Bifacial Perovskite Photodetector

Azamat,

Parkhomenko,

Kiani

et al. 2023

ACS Appl. Opt. Mater.

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Perovskite photodetectors (PPDs) may have an exciting commercial impact owing to their excellent device performance and affordability. However, to enhance their competitiveness in the industry, a few technological aspects of PPDs, such as scalability, robustness, weight, and semitransparency, still require further improvement. This work focuses on the scalable fabrication of PPDs on plastic substrates using slot-die coating techniques employing dielectric−metal−dielectric (DMD) transparent top contacts. The DMD provides the devices with a bifaciality feature. The device's functional layers are deposited using the slot-die coating technique, whereas the top DMD contacts are deposited using thermal evaporation. The fabricated devices demonstrate remarkable performance and a high bifaciality factor in the visible spectrum. For bottom-side illumination, the responsivity and detectivity of devices have excellent values reaching 0.2 A W −1 and 2 × 10 11 Jones, respectively. As for top-side illumination, they are as high as 0.15 A W −1 and 1.47 × 10 11 Jones, respectively. The overall bifaciality factor in devices for the visible spectrum is around 65% and can reach values of up to 78% in the 610−650 nm range. Furthermore, the fabricated devices without any encapsulation in air maintain around 28% of their initial performance after 50 bendings.

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Transparent photovoltaic window for visible light communications with onsite power and reliable machine learning features

Cited by 12 publications

References 58 publications

Enhanced Fibrillar Network and Molecular Crystallization via Volatile Solid Additives Enable Efficient Near‐Infrared Organic Photodetectors

Enhanced Fibrillar Network and Molecular Crystallization via Volatile Solid Additives Enable Efficient Near‐Infrared Organic Photodetectors

Semitransparent Near‐Infrared Organic Photodetectors: Flexible, Large‐Area, and Physical‐Vapor‐Deposited for Versatile Advanced Optical Applications

Self-Powered Printed Flexible Bifacial Perovskite Photodetector

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