THIs ppt file is prepared for nanodevices course seminar and is described by a micro and nano electronic devices student.

1. ENERGY HARVESTING BY ZNO
NANOSTRUCTURES
By:
Alireza Moazzeni
Supervisor:
Dr.Z.Kordrostami
winter 2018
Shiraz University
Faculty Of Elecrical Engineering
Department Of Micro And Nano Electronic Devices

2. ENERGY HARVESTING
ZNO
ENERGY HARVESTNG BY ZNO
SOLAR ENERGY HARVESTING USING ZNO
NANOSTRUCTURES
MECHANICAL ENERGY HARVESTING USING
ZNO NANOSTRUCTURES
HYBRID DESIGN
CONTENTS
CONCLUSION 1

3. ENERGY HARVESTING
Introduction
 Energy recovery from wasted or unused power
 industrial machines, human activity, vehicles, structures and environment
sources
2

4. ENERGY HARVESTING
Sources
3

5.  1- Power harvesting for sensor networks using
MEMS/thin/thick film approach
 2-Power harvesting for electronic devices using bulk
approach
ENERGY HARVESTING
Classification:
4

6. ZNO
Introduction
 Semiconductor material
 Piezoelectric material
5

7.  One-dimensional (1D) and two-dimensional (2D) forms of ZnO nanostructures
 Ability to control the synthesis of various ZnO nanostructures
 Wide bandgap of 3.37 eV
 Biologically safe and environment friendly
ZNO
Properties
Applications
 Ultraviolet (UV) lasers
 Light-emitting Diodes
 Field Emission devices
 High performance nanosensors
9

8.  Developing a novel wireless nano-scale system
ENERGY HARVESTING BY ZNO
Target:
How:
 1-Using a battery
 2-Energy harvesting
CHALLENGES
 1-small-sized
 2-Lightweighting
 3-Long lifetime
 4-Safety
Nanogenerators CHALLENGES  Cheap
 Working all the time Hybrid approach
7

9. SOLAR ENERGY HARVESTING USING ZNO
NANOSTRUCTURES
 Replaces with Tio2 as photoanode
 higher electronmobility and greater flexibility in the synthesis
 Better electron transport
 Reduced recombination
 rapid electrontransfer and collection
Dye-sensitized solar cells(DSSC):
8

10. SOLAR ENERGY HARVESTING USING ZNO
NANOSTRUCTURES
Dye-sensitized solar cells(DSSC):
9

11. SOLAR ENERGY HARVESTING USING ZNO
NANOSTRUCTURES
 In regular (ITO)modifie with poly(3,4-
ethylenedioxythiophene):poly(styrenesulfo-nate) (PEDOT:PSS) Is used as the
anode
 PEDOT:PSS is an acidic water that causes instability in the photoactive layer
and corrosion of the ITO
Regular Bulk hetero-junction organic solar cells:
10

12. SOLAR ENERGY HARVESTING USING ZNO
NANOSTRUCTURES
Modified Bulk hetero-junction organic solar cells:
 ITO serves as the cathode and a high work function metal as the anode
 ZNO is used to transfer elctrons anode
 high electron mobility
 high degree of transparency in the visible wavelength range
11

13. MECHANICAL ENERGY HARVESTING USING
ZNO NANOSTRUCTURES
 Solar energy may not be the best choice For mobile
electronics
 Mechanical energy which is called random energy with
irregular amplitudes and frequencies, is available almost
everywhere at all times.
Piezoelectricity
12

14. WORKING PRINCIPLE OF NANOGENERATORS
 Alternating current (AC) and direct current (DC)
 Power generations relies on the coupled semiconducting
and piezoelectric properties.
 External force causes piezoelectric potential
 Voltage and current pulses can be recorded by applying
and releasing the force.
13

15. WORKING PRINCIPLE OF NANOGENERATORS
DC current:
 Schottky barrier between the ZnO nanowire and an electrode
 To generate a measurable signal above the noise the presence of a schottky is
essential
 Tited nanowires
14

16. WORKING PRINCIPLE OF NANOGENERATORS
AC current:
 Schottky barrier between the ZnO nanorods and an electrode
 VERTICAL nanorodss
15

17. FABRICATION AND DESIGN
 Average diameter:80nm
 Height :2 Mm
Thermally Stable Paper-based Nanogenerators
16

18. HYBRID DESIGN
17

19. OPPORTUNITIES:
 Doping of various ferroelectric materials
into the zno nanowires
 Using in huge industries
18

20. CONCLUSION:
 Successful Demonstrations Of Photovoltaic, Piezoelectric, And Hybrid Devices
For Energy Harvesting Using Zno Nanostructures.
 The controlled morphologies of various ZnO nanostructures, high electron
mobility enable fast electron transport which improve the charge collection
efficiency in solar cells
 mechanical energy harvesting using nanogenerators is to replace or
supplement the current battery systems and create a more efficient source of
power
19

21. HARVESTING ENERGY FROM BRIDGE VIBRATIONS
20

22. REFRENCES:
 [1] Brijesh Kumara, Sang-WooKim, Energy harvesting based on semiconducting
piezoelectric ZnO nanostructures, Sungkyunkwan University (SKKU), Suwon 440-
746, Republic of Korea ,ELSEVIER, 14 February 2012
 [2] Xi Chen,* Shiyou Xu,† Nan Yao,*,‡ and Yong Shi, 1.6 V Nanogenerator for
Mechanical Energy Harvesting Using PZT Nanofibers, Department of
Mechanical Engineering, Stevens Institute of Technology, Castle Point on Hudson,
Hoboken, New Jersey 07030, Nano Lett. 2010, 10, 2133-–2137
21

23. QUESTIONS

24. THANK YOU