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Resistance-free charge spreading for LEDs and solar cells

Project information

Grant agreement ID: 825142

Status

Ongoing project

  • Start date

    1 January 2019

  • End date

    30 June 2020

Funded under:

H2020-EU.1.1.

  • Overall budget:

    € 150 000

  • EU contribution

    € 150 000

Hosted by:

AALTO KORKEAKOULUSAATIO SR

Finland

Objective

Joule heating due to electrical resistance associated with current spreading in semiconductors is a significant loss mechanism in modern state-of-the-art high power light emitting diodes (LEDs) and high concentration solar cells. These losses can account for up to 10-30 % of the device power consumption under high power conditions, and thereby dramatically reduce the efficiency of solar energy harvesting and general lighting, whose efficiencies – apart from the resistive losses – are gradually closing in on their theoretical limits. In ZeroR we make use of a conceptually simple but functionally dramatic modification to the previous buried active region (AR) devices, like LEDs, lasers and solar cells, by relocating the AR to outside the pn-junction, allowing e.g. locating the AR on the device surface – or locating all the contact structures fully on one side of the active region, eventually enabling a fully scalable and essentially resistance free structures. We analyze the commercial prospects of the technology and show that it provides new freedom for high power semiconductor device design. The main goal of ZeroR is to facilitate further commercial development of the concept and to demonstrate the elimination of resistive losses in industrially relevant LED and solar cell prototypes using gallium nitride and gallium arsenide based compound semiconductor material systems. If successful, this approach can substantially increase the device efficiency at selected high power operating conditions and substantially expedite the ongoing solid state lighting revolution and market penetration, also providing more efficient new solutions for solar energy harvesting and selected other applications.

Host institution

AALTO KORKEAKOULUSAATIO SR

Address

Otakaari 1
02150 Espoo

Finland

Activity type

Higher or Secondary Education Establishments

EU Contribution

€ 150 000

Beneficiaries (1)

AALTO KORKEAKOULUSAATIO SR

Finland

EU Contribution

€ 150 000

Project information

Grant agreement ID: 825142

Status

Ongoing project

  • Start date

    1 January 2019

  • End date

    30 June 2020

Funded under:

H2020-EU.1.1.

  • Overall budget:

    € 150 000

  • EU contribution

    € 150 000

Hosted by:

AALTO KORKEAKOULUSAATIO SR

Finland