We're focused on developing and applying photoemission spectroscopies, admittance spectroscopies, and electrochemical methods to understand doping, defects, and degradation in organic semiconductors and organic metal halide perovskites.https://bsky.app/profile/grahamlab.bsky.socialhttps://bsky.app/profile/grahamlab.bsky.social/post/3lar2xf7pwe2gIncreasing the stability of organic metal halide perovskites remains a major challenges. Led by Tareq Hossain, we show how the ammonium cation structure can be used to increase stability in 2D tin halide perovskites: https://pubs.acs.org/doi/10.1021/acs.chemmater.4c0125112 Nov 2024 14:42 +0000at://did:plc:2md6jthudc7kf2m2j65rw77d/app.bsky.feed.post/3lar2xf7pwe2ghttps://bsky.app/profile/grahamlab.bsky.social/post/3lar2wlbdnu2gThe counterion can significantly influence the electronic and thermoelectric properties of doped conjugated polymers. Here, we show that the counterion size plays a role in determining whether the Seebeck coefficient changes sign upon heavy doping. https://link.springer.com/article/10.1557/s43579-024-00665-x12 Nov 2024 14:42 +0000at://did:plc:2md6jthudc7kf2m2j65rw77d/app.bsky.feed.post/3lar2wlbdnu2ghttps://bsky.app/profile/grahamlab.bsky.social/post/3lar2uhtgwe2gThe Graham Lab is now on Bluesky! Follow us at @grahamlab.bsky.social to hear about our recent work, thoughts, and group activity. Posts will now appear on both bluesky and X.12 Nov 2024 14:41 +0000at://did:plc:2md6jthudc7kf2m2j65rw77d/app.bsky.feed.post/3lar2uhtgwe2g