All Publications

  • Compositional Engineering for Efficient Wide Band Gap Perovskites with Improved Stability to Photoinduced Phase Segregation ACS ENERGY LETTERS Bush, K. A., Frohna, K., Prasanna, R., Beal, R. E., Leijtens, T., Swifter, S. A., McGehee, M. D. 2018; 3 (2): 428–35
  • Optical and Compositional Engineering of Wide Band Gap Perovskites with Improved Stability to Photoinduced Phase Segregation for Efficient Monolithic Perovskite/Silicon Tandem Solar Cells Bush, K. A., Palmstrom, A. F., Yu, Z. J., Frohna, K., Manzoor, S., Ali, A., Ali, W., Prasanna, R., Beal, R. E., Leijtens, T., Bent, S. F., Holman, Z., McGehee, M. D., IEEE IEEE. 2018: 0189–91
  • Towards enabling stable lead halide perovskite solar cells; interplay between structural, environmental, and thermal stability JOURNAL OF MATERIALS CHEMISTRY A Leijtens, T., Bush, K., Cheacharoen, R., Beal, R., Bowring, A., McGehee, M. D. 2017; 5 (23): 11483–500

    View details for DOI 10.1039/c7ta00434f

    View details for Web of Science ID 000403228200008

  • Cesium Lead Halide Perovskites with Improved Stability for Tandem Solar Cells. journal of physical chemistry letters Beal, R. E., Slotcavage, D. J., Leijtens, T., Bowring, A. R., Belisle, R. A., Nguyen, W. H., Burkhard, G. F., Hoke, E. T., McGehee, M. D. 2016; 7 (5): 746-751


    A semiconductor that can be processed on a large scale with a bandgap around 1.8 eV could enable the manufacture of highly efficient low cost double-junction solar cells on crystalline Si. Solution-processable organic-inorganic halide perovskites have recently generated considerable excitement as absorbers in single-junction solar cells, and though it is possible to tune the bandgap of (CH3NH3)Pb(BrxI1-x)3 between 2.3 and 1.6 eV by controlling the halide concentration, optical instability due to photoinduced phase segregation limits the voltage that can be extracted from compositions with appropriate bandgaps for tandem applications. Moreover, these materials have been shown to suffer from thermal degradation at temperatures within the processing and operational window. By replacing the volatile methylammonium cation with cesium, it is possible to synthesize a mixed halide absorber material with improved optical and thermal stability, a stabilized photoconversion efficiency of 6.5%, and a bandgap of 1.9 eV.

    View details for DOI 10.1021/acs.jpclett.6b00002

    View details for PubMedID 26863290