Bus stop using large-scale perovskite solar cell
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Solution Overview
Problem
Conventional bus stops often lack a reliable and sustainable power source, leading to safety concerns and environmental issues, especially in areas without external power supply infrastructure, and they do not effectively monitor air quality or provide comfortable waiting conditions for passengers.
Innovation Solution
A bus stop equipped with a large-scale perovskite solar cell using a graphene-carbon nanotube hybrid structure that maintains efficiency in humid and oxygen conditions, integrated with a fine dust sensor for air quality monitoring, LED lighting, and a heating/cooling system powered by solar energy, allowing for safe and comfortable waiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional solar cell materials (spiro-OMeTAD) are used in the hole conductive layer, then the solar cell can be manufactured with existing processes, but the solar cell efficiency degrades rapidly in humid and oxygen conditions
Solution Approach 1:
The patent uses a composite material consisting of graphene and carbon nanotubes in the hole conductive layer. This composite structure combines the high electrical conductivity of graphene with the mechanical strength and environmental stability of carbon nanotubes, creating a material that resists corrosion in humid and oxygen conditions while maintaining solar cell efficiency.
Solution Approach 2:
The patent changes the material parameters of the hole conductive layer by replacing organic materials (spiro-OMeTAD) with carbon-based materials (graphene-carbon nanotube composite). This parameter change fundamentally alters the chemical stability and environmental resistance of the solar cell, enabling it to maintain efficiency in harsh conditions.
2Reliability
If external power supply infrastructure is installed at bus stops, then lighting and safety devices can be powered reliably, but the construction difficulty and cost increase significantly
Solution Approach 1:
The bus stop system generates its own power through integrated solar cells, eliminating the need for external power supply infrastructure. The solar cells convert sunlight directly into electrical energy, which is then stored in energy storage devices (batteries) for use during nighttime or cloudy periods, making the system self-sufficient and easy to install anywhere.
Solution Approach 2:
The solar cell system serves multiple functions: generating power for lighting, powering air quality sensors, operating heating/cooling devices, and charging energy storage devices. This multi-functionality eliminates the need for separate power infrastructure for each device, simplifying installation and reducing overall complexity.
3Loss of information
If air quality monitoring devices are added to bus stops, then real-time air quality information can be provided to passengers, but the device complexity increases
Solution Approach 1:
The patent integrates air quality sensors with the existing solar cell power system and bus stop infrastructure. The sensors share the same power source, housing, and control electronics as other bus stop devices, thereby providing air quality monitoring functionality without significantly increasing overall system complexity.
4Ease of operation
If heating and cooling devices are installed in bus stop chairs, then passenger comfort is improved, but the energy consumption increases
Solution Approach 1:
The solar cells continuously convert sunlight into electrical energy during daytime, which is stored in energy storage devices. This continuous energy generation and storage ensures that heating and cooling devices can operate whenever needed without interruption, maintaining passenger comfort while managing energy consumption through efficient storage and utilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a sustainable power source, enhances passenger safety and comfort by enabling lighting and temperature control, and allows for real-time air quality monitoring, addressing the limitations of conventional bus stops.
Implementation Method 1
a solar cell unit for producing electrical energy from sunlight
Implementation Method 2
a perovskite solar cell is prepared using a hybrid structure including a graphene-carbon nanotube to maintain the efficiency of the solar cell
Data Source
AI summary
Disclosed is a bus stop using a large-scale perovskite solar cell in which a perovskite solar cell is prepared using a hybrid structure including a graphene-carbon nanotube. The bus stop includes a body unit fixed to the ground to maintain the overall shape, a solar cell unit for producing electrical energy from sunlight, and an energy storage system (ESS) for storing the electrical energy produced by the solar cell part.