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Related Experiment Video

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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Quantum photocell: using quantum coherence to reduce radiative recombination and increase efficiency.

Marlan O Scully¹

¹Texas A&M University, College Station, Texas 77843, USA.

Physical Review Letters

|September 28, 2010

Summary

Quantum coherence can overcome the fundamental limit to photovoltaic efficiency, potentially exceeding classical limits. This breakthrough aligns with thermodynamic laws, opening new avenues for solar energy research.

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Area of Science:

Quantum physics
Photovoltaics
Thermodynamics

Background:

The theoretical maximum efficiency of solar cells is limited by radiative recombination, which balances radiative absorption.
This limit, known as detailed balance, has long been a fundamental constraint in photovoltaic research.

Purpose of the Study:

To investigate if quantum coherence can be leveraged to surpass the classical limit of photovoltaic efficiency.
To explore a quantum limit to photovoltaic operation beyond the established detailed balance.

Main Methods:

The study theoretically demonstrates the possibility of breaking detailed balance using quantum coherence.
Analogies are drawn to phenomena like lasing without inversion and quantum heat engines.

Main Results:

Quantum coherence offers a pathway to exceed the fundamental limit imposed by radiative recombination.
A novel quantum limit for photovoltaic efficiency is proposed, surpassing the classical thermodynamic limit.

Conclusions:

The findings suggest that quantum effects can be harnessed to enhance solar cell performance beyond current theoretical maximums.
This research is consistent with the established laws of thermodynamics, providing a robust theoretical framework.