[17] J.-Y. D. Roh, M. D. Smith, M. J. Crane, D. Biner, T. J. Milstein, K. W. Krämer, D. R. Gamelin. "Yb3+ Speciation and Energy-Transfer Dynamics in Quantum-Cutting Yb3+-Doped CsPBCl3 Perovskite Nanocrystals and Single Crystals." Phys. Rev. Mat. 4, 105405 (2020)