Colloidal Quantum Dot:Organic Ternary Ink for Efficient Solution-Processed Hybrid Solar Cells

Jeong, Hoon-Seok; Kim, Dongeon; Jee, Seungin; Si, Min-Jae; Kim, Changjo; Lee, Jung‐Yong; Jung, Yujin; Baek, Se‐Woong

doi:10.1155/2023/4911750

Cited by 7 publications

(2 citation statements)

References 72 publications

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“…Furthermore, the diffusive (bulk charges) and capacitive (surface charges) contributions of the specific current density were evaluated using the modified power law [3]. Figure 6(e) depicts the current contribution calculated using CV profiles for 3CN nanocomposite aerogels, and that for other aerogel electrodes (NCS, 1CN, and 5CN) is provided in Figure S8 (SI).…”

Section: Electrochemical Performance Of Ncs/cn Nanocompositementioning

confidence: 99%

“…Developing sustainable, environmentally friendly, and clean energy is an urgent requirement due to the growth of the population and the overutilization of fossil fuels [1,2]. In recent days, solar cells, supercapacitors, and lithium-ion batteries are well emerged as clean energy sources [3][4][5][6][7]. Therefore, supercapacitor (SC) use has increased in electric vehicles, smart grid technology, and industrial power management [8,9].…”

Section: Introductionmentioning

confidence: 99%

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In Situ Sol-Gel Assembly of Graphitic Carbonitride Nanosheet-Supported Colloidal Binary Metal Sulfide into Nanosandwich-Like Multifunctional 3D Macroporous Aerogel Catalysts for Asymmetric Supercapacitor and Electrocatalytic Oxygen and Hydrogen Evolution

Parale,

Kim,

Phadtare

et al. 2023

International Journal of Energy Research

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It is challenging to develop scalable and stable multifunctional catalysts for energy storage and conversion applications. To address the above challenges, we designed 3D macroporous nanosandwich-like aerogels using an in situ sol-gel assembly for 2D g-C3N4 nanosheet-supported NiCo2S4 nanoporous aerogels. The resultant in situ method not only assembles NiCo2S4 but also 2D g-C3N4 into the sandwich-like 3D network, allowing rapid ion and electron transport. The potential of g-C3N4 and NiCo2S4 in electrochemical energy storage and electrocatalysis is promising for improving its electrochemical activities. The synthesized 3D NiCo2S4/g-C3N4 (3%) composite aerogel electrode achieved a remarkable specific capacitance value, 1083 F·g-1 at 5 mA·cm-2 current density with 87.03% cyclic stability. Furthermore, the asymmetric electrochemical supercapacitor device was fabricated with a maximum specific energy of 43 Wh·kg-1, with outstanding electrochemical stability of about 97% over 10,000 charge/discharge cycles. In addition, NiCo2S4/g-C3N4 (3%) catalysts achieved 294 and 155 mV as oxygen and hydrogen evolution reaction overpotentials, respectively, at 20 and 10 mA·cm-2 current density values. This study provides a new method for the conversion of 2D sheets and 0D colloidal network into 3D macroporous nanocomposite aerogels in multifunctional applications.

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Section: Electrochemical Performance Of Ncs/cn Nanocompositementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Situ Sol-Gel Assembly of Graphitic Carbonitride Nanosheet-Supported Colloidal Binary Metal Sulfide into Nanosandwich-Like Multifunctional 3D Macroporous Aerogel Catalysts for Asymmetric Supercapacitor and Electrocatalytic Oxygen and Hydrogen Evolution

Parale,

Kim,

Phadtare

et al. 2023

International Journal of Energy Research

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P‐Type Colloidal InSb Quantum Dot Ink Enables III–V Group Bulk‐Heterojunction Shortwave Infrared (SWIR) Photodetector

Jee,

Si,

Choi

et al. 2024

Advanced Optical Materials

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Infrared (IR) optoelectronics have become important owing to their various applications, such as recognition, autonomous driving, and quantum communications. In particular, detection beyond 1400‐nm wavelength in the shortwave IR (SWIR) spectrum (i.e., 1550 nm) is important for eye safety, and long‐range communication. Recently, group III–V (InAs or InSb) colloidal quantum dots (CQDs) have attracted considerable interest due to their broadband optical tunability and toxic‐elements (Pb and Hg)‐free properties. Herein, a new approach is developed to synthesize highly monodispersed InSb CQD by employing the continuous injection method, which enables facile optical bandgap tuning at a SWIR wavelength of up to 0.9 eV. Furthermore, solution ligand exchange using halides and thiolates results in effective passivation of the InSb CQD surface and renders a stable p‐type CQD ink. Finally, bulk heterojunction (BHJ) structure is demonstrated using n‐type InAs:p‐type InSb CQDs, which exhibits broad absorption up to 1600 nm, and a sixfold higher responsivity compared with the pristine InSb CQD device due to the efficient charge transport in BHJ CQD solids.

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Colloidal InAs Quantum Dot‐Based Infrared Optoelectronics Enabled by Universal Dual‐Ligand Passivation

Si,

Jee,

Yang

et al. 2024

Advanced Science

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Solution‐processed low‐bandgap semiconductors are crucial to next‐generation infrared (IR) detection for various applications, such as autonomous driving, virtual reality, recognitions, and quantum communications. In particular, III–V group colloidal quantum dots (CQDs) are interesting as nontoxic bandgap‐tunable materials and suitable for IR absorbers; however, the device performance is still lower than that of Pb‐based devices. Herein, a universal surface‐passivation method of InAs CQDs enabled by intermediate phase transfer (IPT), a preliminary process that exchanges native ligands with aromatic ligands on the CQD surface is presented. IPT yields highly stable CQD ink. In particular, desirable surface ligands with various reactivities can be obtained by dispersing them in green solvents. Furthermore, CQD near‐infrared (NIR) photodetectors are demonstrated using solution processes. Careful surface ligand control via IPT is revealed that enables the modulation of surface‐mediated photomultiplication, resulting in a notable gain control up to ≈10 with a fast rise/fall response time (≈12/36 ns). Considering the figure of merit (FOM), EQE versus response time (or −3 dB bandwidth), the optimal CQD photodiode yields one of the highest FOMs among all previously reported solution‐processed nontoxic semiconductors comprising organics, perovskites, and CQDs in the NIR wavelength range.

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Colloidal Quantum Dot:Organic Ternary Ink for Efficient Solution-Processed Hybrid Solar Cells

Cited by 7 publications

References 72 publications

In Situ Sol-Gel Assembly of Graphitic Carbonitride Nanosheet-Supported Colloidal Binary Metal Sulfide into Nanosandwich-Like Multifunctional 3D Macroporous Aerogel Catalysts for Asymmetric Supercapacitor and Electrocatalytic Oxygen and Hydrogen Evolution

In Situ Sol-Gel Assembly of Graphitic Carbonitride Nanosheet-Supported Colloidal Binary Metal Sulfide into Nanosandwich-Like Multifunctional 3D Macroporous Aerogel Catalysts for Asymmetric Supercapacitor and Electrocatalytic Oxygen and Hydrogen Evolution

P‐Type Colloidal InSb Quantum Dot Ink Enables III–V Group Bulk‐Heterojunction Shortwave Infrared (SWIR) Photodetector

Colloidal InAs Quantum Dot‐Based Infrared Optoelectronics Enabled by Universal Dual‐Ligand Passivation

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