Related Experiment Video
Updated: Jan 22, 2026
10:49
Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading
Published on: March 6, 2014
17.8K
High-Performance Hybrid InP QDs/Black Phosphorus Photodetector
Do-Hyun Kwak1, Parthiban Ramasamy1, Yang-Soo Lee1
1Department of Energy Science & Engineering , DGIST , Daegu 42988 , Republic of Korea.
ACS Applied Materials & Interfaces
|July 20, 2019
Summary
This study introduces a novel, high-performance photodetector using nontoxic InP quantum dots (QDs) and black phosphorus (BP). This zero-dimensional-two-dimensional (0D-2D) hybrid device offers exceptional sensitivity for advanced optoelectronic applications.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Zero-dimensional-two-dimensional (0D-2D) hybrid optoelectronic devices offer high sensitivity and performance.
- Existing devices often use toxic nanomaterials, limiting practical applications.
- Nontoxic alternatives are crucial for developing safer, high-performance optoelectronics.
Purpose of the Study:
- To fabricate a high-performance 0D-2D hybrid photodetector using nontoxic materials.
- To investigate the effect of surface treatments on charge injection efficiency.
- To demonstrate the potential of III-V semiconducting quantum dots in photodetector applications.
Main Methods:
- Fabrication of a photodetector using indium phosphide (InP) quantum dots (QDs) and black phosphorus (BP).
- Surface treatment of colloidal QDs with 1,2-ethanedithiol and thermal treatment to remove long ligands.
- Characterization of photodetector performance, including responsivity and detectivity.
Main Results:
- The InP QDs/BP hybrid photodetector achieved high responsivity (1 × 109 A/W) and detectivity (4.5 × 1016 Jones).
- Surface treatments effectively improved charge injection between InP QDs and BP.
- The device exhibited excellent performance under low illumination (0.05 μW cm-2) at 405 nm.
Conclusions:
- Nontoxic InP QDs and BP can form highly sensitive and effective 0D-2D hybrid photodetectors.
- Surface modification strategies are key to optimizing interfacial charge transfer in hybrid devices.
- III-V semiconducting QDs are promising for developing next-generation, high-performance photodetectors.
Related Concept Videos
03:35Hybridization of Atomic Orbitals II
48.2K
sp3d and sp3d 2 Hybridization
48.2K
01:21The Phosphorus Cycle
43.7K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
43.7K
01:10Detection of Black Holes
2.5K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
2.5K
02:29Hybrid Zones
21.8K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
21.8K
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
6.8K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
6.8K
03:24Hybridization of Atomic Orbitals I
66.0K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
66.0K