Related Experiment Video
Updated: Oct 22, 2025
11:26
Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
12.7K
Twisted Light-Enhanced Photovoltaic Effect
Kristan Bryan Simbulan1,2, Yi-Jie Feng1, Wen-Hao Chang3
1Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan.
ACS Nano
|August 26, 2021
Summary
Twisted light with orbital angular momentum (OAM) improved the performance of molybdenum disulfide (MoS2) photovoltaic devices. This enhancement in photoresponse suggests OAM light can boost solar energy conversion efficiency.
Area of Science:
- Optoelectronics
- Materials Science
- Photonics
Background:
- Twisted light possesses orbital angular momentum (OAM), enabling enhanced light-matter interactions.
- Efficient photovoltaic cells are crucial for sustainable energy solutions.
- Two-dimensional molybdenum disulfide (MoS2) exhibits promising optoelectronic properties.
Purpose of the Study:
- To investigate the effect of twisted light's OAM on MoS2 photovoltaic devices.
- To determine if OAM can improve photon absorption and photogenerated carrier enhancement.
- To explore the potential of OAM light for advanced energy applications.
Main Methods:
- Utilized twisted light with varying OAM as the excitation source for a MoS2 photovoltaic device.
- Measured device performance metrics, including open-circuit voltage (VOC) and short-circuit current (ISC).
- Analyzed the correlation between incident light's OAM and the device's photoresponse.
Main Results:
- Increased OAM of incident twisted light led to significant improvements in VOC and ISC.
- Observed enhanced photoresponse in the MoS2 device with higher OAM light.
- Attributed performance gains to improved optical absorption efficiency facilitated by OAM.
Conclusions:
- Orbital angular momentum in light can enhance the photoresponse of MoS2 photovoltaic devices.
- OAM light shows potential for improving light absorption in 2D materials.
- This study highlights a novel approach for optimizing photovoltaic devices using light's OAM.
Related Concept Videos
02:26Photoelectric Effect
36.1K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
36.1K
01:11P-N junction
770
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
770
01:14Photoluminescence: Applications
567
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
567
01:26Photochemical Electrocyclic Reactions: Stereochemistry
2.0K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
2.0K
02:00Photoreceptors and Plant Responses to Light
26.4K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
26.4K
01:23Photoluminescence: Fluorescence and Phosphorescence
2.5K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
2.5K