Qi, J., He, Y., Liu, J., Ma, Y., Zhang, B., Xu, D., Chen, K., Zhou, Y., Mei, A., Yip, H., Li, Z., Han, H. (2026). Geometrically Asymmetric Phosphonium Zwitterions Enable Efficient Printable Mesoscopic Perovskite Solar Cells. Advanced Materials. https://doi.org/10.1002/adma.74629