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Tannir S, Pan Y, Josephs N, Cunningham C, Hendrick NR, Beckett A, McNeely J, Beeler A, Jeffries-El M, Kolaczyk ED. Predicting Emission Wavelengths in Benzobisoxazole-Based OLEDs with Gradient Boosted Ensemble Models. J Phys Chem A 2024. [PMID: 39008894 DOI: 10.1021/acs.jpca.4c00077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
We demonstrate the use of gradient-boosted ensemble models that accurately predict emission wavelengths in benzobis[1,2-d:4,5-d']oxazole (BBO) based fluorescent emitters. We have curated a database of 50 molecules from previously published data by the Jeffries-EL group using density functional theory (DFT) computed ground and excited state features. We consider two machine learning (ML) models based on (i) whole cruciform molecules and (ii) their constituent fragment molecules. Both ML models provide accurate predictions with root-mean-square errors between 30 and 36 nm, competitive with state-of-the-art deep learning models trained on orders of magnitude more molecules, and this accuracy holds even when tested on four new BBO emitters unseen by the models. We also provide an interpretable feature importance analysis and discuss the relevant relationships between DFT and changes in predicted emission wavelength.
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Affiliation(s)
- Shambhavi Tannir
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Yuning Pan
- Department of Mathematics and Statistics, Boston University, Boston, Massachusetts 02215, United States
| | - Nathaniel Josephs
- Department of Statistics, North Carolina State University, Raleigh, North Carolina 27695, United States
| | | | - Nathan R Hendrick
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Annie Beckett
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - James McNeely
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Aaron Beeler
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Malika Jeffries-El
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
- Division of Material Science and Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Eric D Kolaczyk
- Department of Mathematics and Statistics, Boston University, Boston, Massachusetts 02215, United States
- Department of Mathematics and Statistics, McGill University, Montreal, QC H3A 0G4, Canada
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