近日，昆明理工大学材料科学与工程学院陈江照教授团队在化学顶刊Angew. Chem. Int. Ed.上以题为“Crystallization modulation and comprehensive defect passivation by carbonyl functionalized spacer cation towards high-performance inverted perovskite solar cells”发表最新研究成果，昆工材料学院联合培养唐诗应硕士为论文第一作者，昆工材料学院陈江照教授和于月老师、大湾区大学于华教授、河北工业大学陈聪教授及皖西学院张甲甲副教授为论文的通讯作者，昆明理工大学为论文的第2单位，该研究工作得到国家自然科学基金面上、兵团重点领域科技攻关计划等项目的资助。
反式CsFA基无甲铵钙钛矿电池有潜力同时实现高的效率和优异的稳定性。然而，不可控的结晶过程和差的薄膜质量阻碍了光伏性能和稳定性的进一步提升。鉴于此，昆明理工大学陈江照团队提出了基于羰基功能化的间隔阳离子的钙钛矿结晶和缺陷协同调控策略。将L-丙氨酸苄酯盐酸盐（L-ABEHCl）加入钙钛矿前驱液中，增加成核速率和延缓晶体生长速率，从而增加晶粒尺寸和结晶度。进一步使用L-ABEHCl处理制备的钙钛矿薄膜，在钙钛矿薄膜表界生成了2D钙钛矿。结果，L-ABEHCl以有机盐的形式钝化了晶界缺陷，以2D钙钛矿的形式钝化了界面缺陷。由于显著降低的非辐射复合损失，基于协同调控策略的反式电池取得了25.59%的认证效率，这是真空闪蒸技术制备电池报道的最高效率之一。未封装的目标电池在最大功率点工作2300小时后仍然保持初始效率的90.85%。
Figure 1. Mechanisms of crystallization modulation and synergistic passivation of grain boundaries and interface. Schematic illustration of perovskite nucleation and growth of the perovskite films (a) without and (b) with L-ABEHCl additive. (c) Schematic of the synergistic passivation of grain boundaries and interface.
Figure 2. Photovoltaic performance and long-term stability. (a) J-V curves of the champion control, L-ABEHCl(A), L-ABEHCl(I) and L-ABEHCl(A@I) devices prepared by anti-solvent method. (b) J-V curves of the champion control, L-ABEHCl(A), L-ABEHCl(I) and L-ABEHCl(A@I) devices prepared by vacuum flash evaporation in ambient air. (c) PCE of the unencapsulated four devices measured at MPP under continuous one-sun illumination in N2 atmosphere. (d) Air storing stability evolution of the unencapsulated devices held at 25%~30% relative humidity. (e) Thermal stability evolution of the unencapsulated devices held at 85 ℃ in N2.
论文链接：
Shiying Tang#, Zuolin Zhang#, Yue Yu*, Xinxing Liu, Dongmei He, Xuxia Shai, Jiajia Zhang*, Jing Feng, Jianhong Yi, Cong Chen*, Hua Yu*, Jiangzhao Chen*. Crystallization modulation and comprehensive defect passivation by carbonyl functionalized spacer cation towards high-performance inverted perovskite solar cells. Angewandte Chemie International Edition 2025, e202425605.
https://onlinelibrary.wiley.com/doi/10.1002/anie.202425605
