LMU Researchers Boost Perovskite Solar Efficiency Through Precision Molecular Interface Engineering Strategy

Discover how LMU Munich researchers are using molecular interface engineering to improve perovskite solar cell stability and efficiency for space and earth.

By: AXL Media

Published: Apr 29, 2026, 6:42 AM EDT

Source: Information for this report was sourced from EurekAlert!

A Molecular Breakthrough in Photovoltaic Interface Engineering

The rapid evolution of perovskite solar technology has reached a critical milestone as researchers from Ludwig-Maximilians-Universität München (LMU) successfully refined the electrical charge extraction process. By focusing on the ultrathin molecular interlayers that facilitate charge transport, the team has addressed a long-standing bottleneck in solar cell efficiency. According to the study published in Advanced Energy Materials, this development moves the technology closer to commercial viability by ensuring that the interface between the electrode and the active solar layer functions with surgical precision.

Challenging Established Norms in Surface Chemistry

The research, led by Dr. Erkan Aydin, introduces a solution-based method to treat indium tin oxide electrodes, which are standard components in transparent conductive substrates. Historically, scientists operated under the assumption that maximizing surface hydroxylation was the primary goal for optimal binding. However, first author Rik Hooijer explained that a balanced ratio of various oxygen species actually creates a more electronically favorable interface. This strategic shift in chemical application allows for a more uniform coverage of self-assembled monolayers, which are essential for extracting electrical energy from incident light.

Quantifiable Gains in Energy Conversion and Reliability

The implementation of this refined surface treatment has yielded immediate improvements in how solar cells convert sunlight into usable power. Beyond the increase in absolute efficiency, the LMU team observed a significantly narrower distribution of performance values across tested devices. This enhanced reproducibility suggests that the manufacturing process is becoming more predictable, a vital factor for industrial scaling. Dr. Aydin noted that the treatment improves the lifetime of the molecular contact-coated substrates, providing the reliability necessary for transitioning these devices from laboratory settings to real-world infrastructure.