biostudies-literatureLi BInnovation and Technology Fund (ITF)National Natural Science Foundation of ChinaInnovation and Technology FundNational Natural Science Foundation of China (National Science Foundation of China)2753https://www.ebi.ac.uk/biostudies/studies/S-EPMC10980693biostudies-literatureUnknown15(1)Low-dimensional/three-dimensional perovskite heterojunctions have shown great potential for improving the performance of perovskite photovoltaics, but large organic cations in low-dimensional perovskites hinder charge transport and cause carrier mobility anisotropy at the heterojunction interface. Here, we report a low-dimensional/three-dimensional perovskite heterojunction that introduces strong aromatic conjugated low-dimensional perovskites in p-i-n devices to reduce the electron transport resistance crossing the perovskite/electron extraction interface. The strong aromatic conjugated π-conjugated network results in continuous energy orbits among [Pb₂I₆]^2- frameworks, thereby effectively suppressing interfacial non-radiative recombination and boosting carrier extraction. Consequently, the devices achieved an improved efficiency to 25.66% (certified 25.20%), and maintained over 95% of the initial efficiency after 1200 hours and 1000 hours under ISOS-L-1I and ISOS-D-1 protocols, respectively. The chemical design of strong aromatic conjugated molecules in perovskite heterojunctions provides a promising avenue for developing efficient and stable perovskite photovoltaics.Nature communicationsHarnessing strong aromatic conjugation in low-dimensional perovskite heterojunctions for high-performance photovoltaic devices.PMC1098069352322318GHP/100/20SZ, GHP/102/20GD, MRP/040/21X, ITS/147/22FPZeng XCZhu ZLiu QGao DLi XLi ZLi SChen ZLu HLi BZhao DGong JZhang CYu ZWang YWu XfalseHarnessing strong aromatic conjugation in low-dimensional perovskite heterojunctions for high-performance photovoltaic devices.Low-dimensional/three-dimensional perovskite heterojunctions have shown great potential for improving the performance of perovskite photovoltaics, but large organic cations in low-dimensional perovskites hinder charge transport and cause carrier mobility anisotropy at the heterojunction interface. Here, we report a low-dimensional/three-dimensional perovskite heterojunction that introduces strong aromatic conjugated low-dimensional perovskites in p-i-n devices to reduce the electron transport resistance crossing the perovskite/electron extraction interface. The strong aromatic conjugated π-conjugated network results in continuous energy orbits among [Pb₂I₆]^2- frameworks, thereby effectively suppressing interfacial non-radiative recombination and boosting carrier extraction. Consequently, the devices achieved an improved efficiency to 25.66% (certified 25.20%), and maintained over 95% of the initial efficiency after 1200 hours and 1000 hours under ISOS-L-1I and ISOS-D-1 protocols, respectively. The chemical design of strong aromatic conjugated molecules in perovskite heterojunctions provides a promising avenue for developing efficient and stable perovskite photovoltaics.2024-01-01T00:00:00Z2024 Mar2025-04-04T20:16:42.208Z2025-04-04T20:16:42.208ZS-EPMC109806933855343610.1038/s41467-024-47112-y