Info
Info
News Article

A Promising Boost To Kesterite Solar Cells

News

Indian researchers report power conversion efficiency of 25 percent from novel multi quantum well approach

As the world moves towards renewable energy, the hunt is on for more efficient, affordable, non-toxic, flexible successors to traditional silicon solar cells.

Kesterite is a promising candidate as it can be made on a large scale using a solution-based, high-throughput roll-to-roll process. But there are challenges to overcome in terms of efficiency.

Now researchers from two leading Indian universities - SRM University and IIITDM, Kancheepuram - have came up with an innovative idea that involves introducing the quantisation effect of nanotechnology into kesterite solar cells.

Kesterite copper-zinc-tin-sulphide (CZTS) crystal has been extensively studied as an absorber material in solar cells to achieve tera-watt power generation. Similar to chalcopyrite-type CuInS2 (CIS), kesterite Cu2ZnSnS4 - Cu2ZnSn(S,Se)4 - Cu2ZnSnSe4 are members of the Cu-chalcogenide material family.

Both chalcopyrite and kesterite are effectively substituted derivatives of the Zinc blende crystal structure of ZnS. These structures have sulphur and/or selenium anions and a range of metal cations. Quaternary CZTS with I2-II-IV-VI4 structure can be derived from CIS by replacing In3+ with Zn2+ and Sn4+.

Kesterite CZTS has a direct bandgap of 1.5 eV and a high absorption coefficient (>104) which is close to the ideal for a single-junction solar cell. The bandgap can also be tuned by altering the S/Se ratio between 1.0 eV for pure selenide and 1.5 eV for pure sulphide compounds.

Despite these success stories, kesterite based solar cells could only achieve 13 to 15 percent efficiency in the last five years.

“Kesterite solar cell does have excellent potential to join in mainstream of PV market as well as many challenges to overcome also,” says S. Routray, a solar PV researcher at SRM University.

Routray and colleagues have proposed multiple quantum wells with very thin layers of two types of kesterite material to avoid high recombination rate. “We have to explore more on the material with new technologies,” said K. P. Pradhan, assistant professor, IIITDM, Kancheepuram.

Using this approach, the team reports a possible power conversion efficiency of 25 percent from MQW Kesterite solar cells in a recent issue of Applied Physics Letters.

The team is now looking forward to fabricating the cell as well as bring new concepts of technology to boost the efficiency of the kesterite solar cell and make it fit for commercial applications in future.

'Towards Quantum Efficiency Enhancement of Kesterite Nanostructured Absorber: A Prospective of Carrier Quantization Effect' by S. Sravani, S. Routray, K. P. Pradhan;" Applied Physics Letter, vol.117, no. 13, Sep, 2020.

New Energy Scout GmbH Becomes Part Of Basler & Hofmann AG
AEG Power Solutions Equips The Microgrid Laboratory Emulator Of Paderborn University
Analysis Of UK Commercial Roof Space Shows Solar PV Film Can Achieve Net Zero Without Greenfield Sites
Everoze Creates Skyray To Design And Engineer Great Solar PV Projects
EnBW Chooses Delta Inverters For 2.62 MWp Solar Farm In Kenzingen
Azelio And JET ENERGY In MoU To Develop Storage Projects With Solar PV In Africa
Oakapple Renewable Energy Appoint Stuart Gentry To Head Business Development
Luxcara Acquires Largest Independent PV Project In Germany From BELECTRIC
BayWa R.e. Sells Subsidy-free Solar Farm In Spain To Commerz Real’s Impact Fund Klimavest
US Solar Fund To Acquire Up To 50% Of 200MWDC Mount Signal 2
Going Green In Lancashire – Hundreds Of Houses Installed With Solar Panels In Ground-breaking Project
ENGIE And Kiwi Power Enter Netherlands’ Grid Flexibility Market
Sonnedix Named ESG Global Solar Power Generation Sector Leader By GRESB
Sonnedix Adds 40 MW Of Capacity To Its Portfolio In Chile
EnergyLink3 And C4V Lead Tesla In Race To Less Toxic Mobile Battery Solution
UK'S Largest Battery Ready To Balance The Grid
SUNfarming Reaches Financial Close On Project Financing For 26 MWp PV Portfolio In Poland
Array Technologies Announces A 1GW Purchase Agreement With RP Construction Services
Sonnedix Acquires 150MW Utility Scale Project Located In Central Chile
SUNfarming Secures EUR 10 Million In Fresh Money For Poland
What Role Can Solar Energy Play In Enabling A Better Future
SunBrush Mobil Delivers Its New Cleaning Device For PV Tracking Systems To Chile
Sunstore Solar Launches WattGrid, A New Range Of Turnkey Off-grid Power Systems
Ingeteam Supplies Solar Inverters For PV Project Of More Than 100MW In Chile

Info
Info
×
Search the news archive

To close this popup you can press escape or click the close icon.
Logo
×
Logo
×
Register - Step 1

You may choose to subscribe to the Solar + Power Magazine, the Solar + Power Newsletter, or both. You may also request additional information if required, before submitting your application.


Please subscribe me to:

 

You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in:
 
X
Info
X
Info
{taasPodcastNotification} Array