Shi Chenyang, Wang Jianan, Lei Xia, Zhou Qisen, Wang Weitao, Yang Zhichun, Liu Sanwan, Zhang Jiaqi, Zhu He, Chen Rui, Pan Yongyan, Tan Zhengtian, Liu Wenguang, Zhao Zhengjing, Cai Zihe, Qin Xiaojun, Zhao Zhiguo, Li Jingbai, Liu Zonghao, Chen Wei
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, 430074, China.
Optics Valley Laboratory, Hubei, 430074, China.
Nat Commun. 2025 Mar 28;16(1):3029. doi: 10.1038/s41467-025-58111-y.
The employment of self-assembled molecular hybrid could improve buried interface in perovskite solar cells (PSCs). However, the interplay among hybrid self-assembled monolayers (SAMs) during the deposition process has not been well-studied. Herein, we study the interaction between co-adsorbents and commonly used SAM material, [4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) for wide-bandgap (WBG) PSCs. It is found that the co-adsorbent, 6-aminohexane-1-sulfonic acid (SA) tends to fill the uncovered sites without interference with Me-4PACz, ensuring the formation of a dense hole selective layer. Moreover, the use of SA/Me-4PACz mixed SAMs could effectively reduce the interfacial non-radiative recombination loss, optimize the energy alignment at the buried interface and regulate the crystallization of WBG perovskite. As a result, the 1.77 eV WBG PSCs deliver a power conversion efficiency (PCE) of 20.67% (20.21% certified) and an impressive open-circuit voltage (V) of 1.332 V (1.313 V certified). By combining with a 1.26 eV narrow-bandgap (NBG) PSC, we further fabricate 2-terminal all-perovskite tandem solar cells (TSCs) with a PCE of 28.94% (28.78% certified) for 0.087 cm and 23.92% for mini-module with an aperture area of 11.3 cm.
自组装分子杂化物的应用可以改善钙钛矿太阳能电池（PSC）中的掩埋界面。然而，在沉积过程中杂化自组装单分子层（SAMs）之间的相互作用尚未得到充分研究。在此，我们研究了共吸附剂与宽带隙（WBG）PSC常用的SAM材料[4-(3,6-二甲基-9H-咔唑-9-基)丁基]膦酸（Me-4PACz）之间的相互作用。发现共吸附剂6-氨基己烷-1-磺酸（SA）倾向于填充未覆盖的位点而不干扰Me-4PACz，确保形成致密的空穴选择性层。此外，使用SA/Me-4PACz混合SAMs可以有效降低界面非辐射复合损失，优化掩埋界面处的能量排列并调节WBG钙钛矿的结晶。结果，1.77 eV的WBG PSC的功率转换效率（PCE）为20.67%（认证值为20.21%），开路电压（V）高达1.332 V（认证值为1.313 V）。通过与1.26 eV窄带隙（NBG）PSC结合，我们进一步制备了两端全钙钛矿串联太阳能电池（TSC），对于0.087 cm²的面积，PCE为28.94%（认证值为28.78%），对于孔径面积为11.3 cm²的微型模块，PCE为23.92%。
