Beneficial instability: self-optimizing optical performance in mixed halide perovskite

Julia van der Burgt; Susan Rigter; Erik Garnett

doi:10.1117/12.2621483

30 May 2022 Beneficial instability: self-optimizing optical performance in mixed halide perovskite

Julia van der Burgt, Susan Rigter, Erik Garnett

Proceedings Volume PC12150, Photonics for Solar Energy Systems IX; PC1215006 (2022) https://doi.org/10.1117/12.2621483
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

The tunable bandgap and excellent optoelectronic properties of mixed-halide perovskites make this an ideal material for application in (tandem) solar cells. Under light exposure, however, these materials show halide segregation. This results in pinning of the open-circuit voltage by the lowest bandgap regions, which limits the solar cell efficiency. A lot of effort has been taken to prevent photosegregation, but instability remains a problem. In this work, instead of preventing it, we make use of the phase segregation through a self-optimizing process to improve solar cell performance. By placing silica microspheres on a mixed-bromide/iodide perovskite film, incoming light is focused to a hotspot underneath the center of the sphere, leading to local phase segregation. Due to energy funneling to the lowest bandgap region, a local emitter is formed in the hotspot. The rules of reciprocity cause the light emitted from this region to be highly directional into the direction of the incoming light. The focusing of both the incoming and the outgoing light by the spheres results in an increase in both the short circuit current and the open-circuit voltage. The resulting solar cell efficiency is significantly higher compared to the same film without spheres. The system is self-optimized and emitters will always be formed at the optimal location underneath the spheres. Due to constant reconfiguration in the perovskite film, the system can realign itself with respect to the position of the sun, resulting in effective concentration without the need for mechanical solar tracking.

Conference Presentation

Citation Download Citation

Julia van der Burgt, Susan Rigter, and Erik Garnett "Beneficial instability: self-optimizing optical performance in mixed halide perovskite", Proc. SPIE PC12150, Photonics for Solar Energy Systems IX, PC1215006 (30 May 2022); https://doi.org/10.1117/12.2621483

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Perovskite

Optical spheres

Solar cells

Absorption

Device simulation

External quantum efficiency

Microscopy

Show All Keywords

Keywords/Phrases

Search In:

Publication Years