Triangular Wire. Below. Perovskite. Ag or TiN. HTM. Perovskite. Ag or TiN. HTM. Perovskite. Ag or TiN. HTM. Perovskite. Ag or TiN. HTM. 200nm. 600nm. 100nm.
Metamaterial absorber for efficient perovskite solar cell Omar Abdelraouf and Nageh Allam
Energy Material Laboratory, The American University in Cairo
Overview • Why metamaterial absorber • Modeling details • Proposed designs • Results • Current work
MRS Spring 2017
2
Why metamaterial absorber surface • Metamaterial: artificial materials consist of periodic array and have exceptional properties • Tune absorption/reflection band of conventional materials from GHz to Optical wavelength https://www.mat.ucsb.edu/~g.legrady/academic/courses/1 0f200a/md/image/metamaterials.jpg
Proposed designs Circular Wire Below and above Perovskite Ag or TiN
HTM
Circular Wire Below Perovskite Ag or TiN
HTM
Triangular Wire Below and above Perovskite Ag or TiN
HTM
Triangular Wire Below Perovskite Ag or TiN
HTM
200nm
200nm
200nm
200nm
600nm
600nm
600nm
600nm
100nm
100nm
100nm
100nm
MRS Spring 2017
5
Results Circular Wire Below and above Perovskite Ag or TiN
HTM
Circular Wire Below Perovskite Ag or TiN
HTM
Triangular Wire Below and above Perovskite Ag or TiN
HTM
Triangular Wire Below Perovskite Ag or TiN
HTM
200nm
200nm
200nm
200nm
600nm
600nm
600nm
600nm
100nm
100nm
100nm
100nm
MRS Spring 2017
6
Circular Wire below and above perovskite Using Silver as metal
Using Titanium nitride instead silver
MRS Spring 2017
7
Results Circular Wire Below and above Perovskite Ag or TiN
HTM
Circular Wire Below Perovskite Ag or TiN
HTM
Triangular Wire Below and above Perovskite Ag or TiN
HTM
Triangular Wire Below Perovskite Ag or TiN
HTM
200nm
200nm
200nm
200nm
600nm
600nm
600nm
600nm
100nm
100nm
100nm
100nm
MRS Spring 2017
8
Circular Wire below perovskite Using Silver as metal
Using Titanium nitride instead silver
MRS Spring 2017
9
Results Circular Wire Below and above Perovskite Ag or TiN
HTM
Circular Wire Below Perovskite Ag or TiN
HTM
Triangular Wire Below and above Perovskite Ag or TiN
HTM
Triangular Wire Below Perovskite Ag or TiN
HTM
200nm
200nm
200nm
200nm
600nm
600nm
600nm
600nm
100nm
100nm
100nm
100nm
MRS Spring 2017
10
Triangular Wire below and above perovskite Using Silver as metal
Using Titanium nitride instead silver
MRS Spring 2017
11
Results Circular Wire Below and above Perovskite Ag or TiN
HTM
Circular Wire Below Perovskite Ag or TiN
HTM
Triangular Wire Below and above Perovskite Ag or TiN
HTM
Triangular Wire Below Perovskite Ag or TiN
HTM
200nm
200nm
200nm
200nm
600nm
600nm
600nm
600nm
100nm
100nm
100nm
100nm
MRS Spring 2017
12
Triangular Wire below perovskite Using Silver as metal
Using Titanium nitride instead silver
MRS Spring 2017
13
Optimum structures 1. Metamaterial surface with two layers • Total absorption −3 −1 • Generation enhancement per (𝑚 𝑠𝑒𝑐 )
2. Metamaterial surface with one layer • Total absorption −3 −1 • Generation enhancement per (𝑚 𝑠𝑒𝑐 ) Optimum structure is Circular Wire Below Perovskite MRS Spring 2017
14
Current Work • Mie theory • Optimize light absorption and light scattering of metal/dielectric • Develop selection rules based on size/shape/material of metal/dielectric used.
• Genetic Algorithm • Use suggested dimensions for proposed designs as initial input to genetic algorithm code to give us more detailed results about optimized metamaterial surface for solar cell.
