Yueh-Lin (Lynn) Loo

About

Professor Yueh-Lin (Lynn) Loo leads research focused on the structural development of complex soft materials to elucidate their processing-structure-function relationships for optoelectronics and energy applications. Her work includes advancing highly transparent, scalable, and stable perovskite solar cells that minimize aesthetic compromise, such as transparent photovoltaics (TPVs) that harvest ultraviolet photons to achieve high transparency and color neutrality while maintaining operational stability and scalability. She has demonstrated the first UV-absorbing TPV using CsPbCl2.5Br0.5 as the absorber, achieving record visible transmittance and color rendering index alongside significant power output and long projected lifetimes under outdoor conditions. Additionally, her research extends the photovoltaic response of perovskite solar cells into the near-infrared spectrum by incorporating multifunctional organic semiconductors that enhance power-conversion efficiency and stability. Professor Loo's work also includes quantifying tie-chain fractions in semiconducting polymers to improve charge transport and developing organic solar cells that harvest near-ultraviolet photons to power electrochromic devices for smart solar spectrum management. She has been recognized as a fellow of the American Institute of Chemical Engineers for her significant professional accomplishments and contributions in engineering, and elected to the National Academy of Engineering for her…

Research topics

• Chemistry
• Materials science
• Organic chemistry
• Artificial Intelligence
• Inorganic chemistry
• Optoelectronics
• Electrical engineering
• Nanotechnology
• Computer Science
• Engineering

Selected publications

• Consensus statement for stability assessment and reporting for perovskite photovoltaics based on ISOS procedures

  Nature Energy · 2020 · 1659 citations

  Abstract Improving the long-term stability of perovskite solar cells is critical to the deployment of this technology. Despite the great emphasis laid on stability-related investigations, publications lack consistency in experimental procedures and parameters reported. It is therefore challenging to reproduce and compare results and thereby develop a deep understanding of degradation mechanisms. Here, we report a consensus between researchers in the field on procedures for testing perovskite sol…

  DOI

• Metastable Dion-Jacobson 2D structure enables efficient and stable perovskite solar cells

  Science · 2022 · 449 citations

  The performance of three-dimensional (3D) organic-inorganic halide perovskite solar cells (PSCs) can be enhanced through surface treatment with 2D layered perovskites that have efficient charge transport. We maximized hole transport across the layers of a metastable Dion-Jacobson (DJ) 2D perovskite that tuned the orientational arrangements of asymmetric bulky organic molecules. The reduced energy barrier for hole transport increased out-of-plane transport rates by a factor of 4 to 5, and the pow…

  DOI

• Accelerated aging of all-inorganic, interface-stabilized perovskite solar cells

  Science · 2022 · 327 citations

  Senior authorCorresponding

  capping layer between the perovskite active layer and hole-transport layer stabilizes the interface while increasing power conversion efficiency of the all-inorganic PSCs from 14.9 to 17.4%. Devices with this 2D capping layer did not degrade at 35°C and required >2100 hours at 110°C under constant illumination to degrade by 20% of their initial efficiency. Degradation acceleration factors based on the observed Arrhenius temperature dependence predict intrinsic lifetimes of 51,000 ± 7000 hours (>…

  DOI

• Sulfur-Donor Solvents Strongly Coordinate Pb²⁺ in Hybrid Organic–Inorganic Perovskite Precursor Solutions

  The Journal of Physical Chemistry C · 2020 · 64 citations

  Senior authorCorresponding

  Strong coordination between Lewis-basic processing additives and the Lewis-acidic lead halide in hybrid organic–inorganic perovskite (HOIP) precursor solutions is required to solubilize the lead halide, and subsequently access the appropriate crystallization kinetics and attain the desired morphology of perovskite active layers. While oxygen-donor solvents and additives, such as dimethylformamide and dimethyl sulfoxide, are widely used for perovskite processing, we demonstrate here that “soft” s…

  DOI

• Photochemical Decomposition of Y‐Series Non‐Fullerene Acceptors Is Responsible for Degradation of High‐Efficiency Organic Solar Cells

  Advanced Energy Materials · 2023-03-08 · 62 citations

  articleOpen accessSenior authorCorresponding

  Abstract Organic photovoltaic cells that employ Y‐series non‐fullerene acceptors (NFAs) have recently achieved impressive power‐conversion efficiencies (>18%). To fulfill their commercial promise, it is important to quantify their operational lifetimes and understand their degradation mechanisms. In this work, the spectral‐dependent photostability of films and solar cells comprising several Y‐series acceptors and the donor polymer PM6 is investigated systematically. By applying longpass filte…

  PublisherOA PDFDOI

Recent grants

• Collaborative Research: Designing Functional Materials with Optimal Learning

  NSF · $250k · 2016–2019

• EAGER: Structural Development of Organometal Halide Perovskites for Thin-film Photovoltaics

  NSF · $100k · 2015–2017

• The Impact of Mechanical Stress and Strains on Organic Semiconductor Thin Films for Flexible Electronic Applications

  NSF · $431k · 2018–2021

Frequent coauthors

• John E. Anthony

  University of Kentucky

  59 shared

• Chad Risko

  48 shared

• Geoffrey E. Purdum

  Bristol-Myers Squibb (United States)

  45 shared

• Sean Parkin

  University of Kentucky

  38 shared

• Kaichen Gu

  Beijing Center for Disease Prevention and Control

  36 shared

• Anna K. Hailey

  29 shared

• Joung Eun Yoo

  Samsung (South Korea)

  28 shared

• Antonio Facchetti

  Georgia Institute of Technology

  28 shared

Labs

• Loo GroupPI

  The Loo Group studies the structural development of complex soft materials to elucidate their processing-structure-function relationships for optoelectronics and energy applications.

Awards & honors

• Fellow, American Institute of Chemical Engineers, 2025
• Fellow, National Academy of Engineering, 2025
• Fellow, Materials Research Society, 2020
• Thomas A. Edison Patent Award, Research and Development Coun…
• Member, Defense Science Study Group, 2019

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