Session: Panel-2 Textbooks and Pedagogy in Micro/Nanoscale Heat and Mass Transfer / 05-04 Micro/Nanoscale Thermal Radiation

Paper Number: 131643

131643 - Power-Generating Smart Glass With Adjustable Spectral Transmission 

Abstract: 

The regulation of solar energy by window glass not only provides for the basic functions of lighting and heating in buildings, but also has the potential to greatly improve the efficiency of energy use. Solar energy range in the wavelength of less than 2.5 μm. Building glass, if not regulate the spectral, will certainly reduce indoor comfort, and make a lot of energy not to be utilized. In order to improve the efficiency of solar energy utilization, we intend to utilize the energy in the near-infrared wavelengths while ensuring light harvesting. The glass is expected to maintain a balance between high visible light transmission and high photoelectric conversion efficiency. Perovskite is a promising new class of photovoltaic materials with considerable photovoltaic conversion efficiency. In recent years, with the development of semi-transparent perovskite devices, perovskite is increasingly being used for light regulation of smart windows to collect excess solar energy as electricity to maximize the overall energy efficiency of buildings.

Herein, we report a design of smart glass with a semi-transparent perovskite interlayer with doped particles that can utilize solar energy to generate electricity while modulating the visible light that passes through the glass. Specifically, we chose a perovskite material and a particle as the doping layer. The perovskite layer was flanked by transparent conductive thin layers. The type and concentration of dopant particles as well as the thickness of each layer are optimized to satisfy the selectivity of the spectrum with high transmittance in the visible wavelength band and to produce the largest possible power generation efficiency. To obtain the optical properties of the doped layer, the dielectric function of the perovskite doped layer was first calculated using the Maxwell-Garnett (MG) effective medium approximation theory, depending on the concentration of doped particles. Next, the transmission matrix method (TMM) was used to calculate the transmission spectrum and power generation efficiency of the whole structure. The particle doping concentration, the thickness of the conductive layers and the thickness of the dopant layer were taken as the variables to be optimized. The average transmittance in the visible band and the photoelectric conversion efficiency of the dopant layer were taken as the objective functions. Under these conditions above, Genetic Algorithm (GA) based multi-objective optimization was carried out to obtain the best structural parameters. The smart glass with balanced transmission and energy utilization reported in this paper is informative for renewable energy utilization and solar spectrum modulation in buildings.

Presenting Author: Shuni Chen Harbin Institute of Technology

Presenting Author Biography: Shuni Chen, from Harbin Institute of Technology, currently majors in Engineering Thermophysics in the School of Energy Science and Engineering, Harbin Institute of Technology. Her main research interest is micro/nanoscale thermal radiation for high efficient utilization of energy.

Authors:

Shuni Chen Harbin Institute of Technology
Yanming Guo Harbin Institute of Technology
Yiquan Gong Harbin Institute of Technology
Chao Shen Harbin Institute of Technology
Yong Shuai Harbin Institute of Technology