Issue 9, 2025

Solar photons beyond the band gap wavelengths: their effect on solution-processed solar cells

Abstract

A deep understanding of how solution-processed solar cells (SSCs) perform under varying temperatures and irradiance is crucial for their optimal design, synthesis, and use. However, current partial spectral characterization, primarily below the band gap wavelengths (λ < λg), limits insights into their full operation. In this work, we expand the current knowledge by providing comprehensive full-spectrum experimental optical characterizations (∼300–2500 nm) and theoretical optical-thermal-electrical analysis for the most common high-efficiency single-junction and tandem organic SSCs (OSCs) and perovskite SSCs (PSCs), including p–i–n OSC, n–i–p OSC, p–i–n PSC, n–i–p mesoscopic PSC, OSC/PSC, and PSC/PSC. By incorporating solar photons above λg in our investigation, we uncover the effects of parasitic absorption (∼300–2500 nm) and conversion losses (λ < λg) on operating temperature and power conversion efficiency (PCE) losses, highlighting the conditions, materials, and optimal architectures for reducing device temperature. These improvements could reduce PCE losses by up to ∼7 times compared to conventional silicon wafer-based solar cells in real-world conditions.

Graphical abstract: Solar photons beyond the band gap wavelengths: their effect on solution-processed solar cells

Supplementary files

Transparent peer review

To support increased transparency, we offer authors the option to publish the peer review history alongside their article.

View this article’s peer review history

Article information

Article type
Communication
Submitted
29 Jan 2025
Accepted
24 Mar 2025
First published
26 Mar 2025
This article is Open Access
Creative Commons BY license

Mater. Horiz., 2025,12, 2922-2934

Solar photons beyond the band gap wavelengths: their effect on solution-processed solar cells

G. Perrakis, A. Panagiotopoulos, T. Maksudov, C. Aivalioti, E. A. Alharbi, S. Fatayer, M. Heeney, A. C. Tasolamprou, G. Kenanakis, K. Petridis, T. D. Anthopoulos, S. R. P. Silva, M. Graetzel, M. Kafesaki and G. Kakavelakis, Mater. Horiz., 2025, 12, 2922 DOI: 10.1039/D5MH00186B

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements