Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP27)
Publication date: 22nd October 2026
Self-assembled monolayers (SAMs) have become the preferred hole-selective contact for inverted-structure perovskite solar cells (PSCs). However, the molecular-scale bottom SAMs/perovskite interface is highly vulnerable to the combined effects of photochemistry, heat, and mechanical stress, making it the main failure site that limits device stability. This work proposes an integrated strategy of interface molecular sealing: anchoring the phosphonic acid-based SAMs on the ITO substrate and covering it with a thin layer of p-type sulfur-containing heterocyclic organic semiconductor to construct a molecularly bonded hole-transport laminate. This bilayer composite passivates interfacial defects and suppresses non-radiative recombination through S–Pb coordination, while the densely packed organic film acts as a halide migration barrier that inhibits iodide accumulation at the interface and markedly enhances the mechanical toughness of the buried interface. Together, these effects transform the originally fragile buried contact into a mechanically robust, chemically protected, and electronically homogeneous interface, decoupling charge extraction from interfacial stabilization. Single-junction cells employing this architecture achieve a certified efficiency of 27.74% (with a stabilized output of 27.51%) and retain 80% of their initial performance after more than 1100 h of maximum power point tracking at 65 °C under full-spectrum illumination. This work establishes interfacial molecular capping as a general route to improving the durability of perovskite photovoltaics, directly targeting the dominant failure mechanism of inverted devices and offering a viable pathway toward commercial stability.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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