Research Themes +
Energy Technologies Area (ETA) researchers are continually building on the strong scientific foundation we have developed over the past 50 years. We address the world’s most pressing climate challenges by bringing to market energy-efficient innovations across the buildings, transportation, and industrial sectors. ETA is at the forefront of developing better batteries for electric vehicles; improving the country's aging electrical grid and innovating distributed energy and storage solutions; developing grid-interactive, efficient buildings; and providing the most comprehensive market and data analysis worldwide for renewable technologies like wind and solar.
Strategic Initiatives +
The Energy Technologies Area (ETA) Strategic Plan is the guiding force for our research and development for the next ten years. It clearly charts a path toward clean-energy solutions and focuses on five detailed Strategic Initiatives. The Plan provides an in-depth look at how ETA is accelerating research to provide affordable, clean energy to all while accomplishing deep, economy-wide decarbonization, looking to avoid a rise in global average temperature while simultaneously developing solutions to increase humanity's resilience to extreme weather volatility.
Publications
News +
For media inquiries,
please contact ETA
Interim Communications Manager
Kiran Julin

kjulin@lbl.gov
About Us +
The Energy Technologies Area (ETA) is unique in translating fundamental scientific discoveries into scalable technology adoption. Our approach combines an understanding of the marketplace and the role of state and federal regulation and policies. ETA's research drives real-world, practical results that affect and improve the everyday lives of Americans and those across the globe. Saving energy and battling the Climate Crisis are key to the foundation of our research, which is driven by technoeconomic analysis and in-lab experimentation and discovery.

Lead-free halide perovskite solar cells with high photocurrents realized through vacancy modulation

Publication Type

Journal Article

Authors

Kumar, M.H., S. Dharani, W.L. Leong, P.P. Boix, R.R. Prabhakar, T. Baikie, C. Shi, H. Ding, Ramamoorthy Ramesh, M. Asta, M. Graetzel, S.G. Mhaisalkar, N. Mathews

DOI

10.1002/adma.201401991

Abstract

A study was conducted to demonstrate that high photocurrent densities of more than 22 mAcm-2 can be attained by utilizing CsSnI 3 as an absorber in solid state perovskite solar cells. Photovoltaic devices with the configuration FTO/compact TiO2 / mesoporous TiO2 /CsSnI3/HTM/Au were prepared. CsSnI3 layers were spin coated on to -300 nm thick mesoporous layers. Two HTMs ? 4, 4', 4''-tris (N,N-phenyl-3-methylamino) triphenylamine (m-MTDATA) and Spiro-OMeTAD were employed for this study. Using DMF and 2-methoxyethanol as solvents for the CsSnI3 resulted in the formation of large islands on the TiO2 scaffold, with significant areas of exposed TiO2.Pristine CsSnI3 as the light absorber does not result in a functional photovoltaic device while compositions with added SnF2, display photovoltaic effect. The unprecedented short circuit photocurrents observed from a pure Sn-based perovskite system reflect the enhanced light harvesting in the infrared region of the solar spectrum.

Journal

Advanced Materials

Volume

Year of Publication

2014

ISSN

09359648

Notes

cited By 427

Research Areas

Ramesh Lab