Self‐Driven Prenucleation‐Induced Perovskite Crystallization Enables Efficient Perovskite Solar Cells

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(22)

Опубликована: Март 31, 2023

Abstract Perovskite film with high crystal quality is fundamental to achieving high‐performance solar cells. A fast nucleation process crucial improving the crystallization quality. Here, we propose a self‐driven prenucleation strategy achieve nucleation. This realized through rational solvent design. The key characteristics of different solvents are systematically evaluated. Among them, formamide, ultra‐high dielectric constant, low Gutman donor number, and boiling point, selected as co‐solvent. These unique render formamide double‐face that good for formamidinium iodide (FAI) CsI while poor PbI 2 . As result, induces ‐DMSO seeding crystals accelerates nucleation, crystalline perovskite film. efficiency hole transport layer‐free carbon‐based cells boosted beyond 19 % first time.

Язык: Английский

---

Holistic energy landscape management in 2D/3D heterojunction via molecular engineering for efficient perovskite solar cells

Science Advances, Год журнала: 2023, Номер 9(23)

Опубликована: Июнь 7, 2023

Constructing two-dimensional (2D) perovskite atop of 3D with energy landscape management is still a challenge in photovoltaics. Here, we report strategy through designing series π-conjugated organic cations to construct stable 2D perovskites and realize delicate level tunability at 2D/3D heterojunctions. As result, the hole transfer barriers can be reduced both heterojunctions within structures, preferable work function shift reduces charge accumulation interface. Leveraging these insights also benefitted from superior interface contact between conjugated poly(triarylamine) (PTAA) transporting layer, solar cell power conversion efficiency 24.6% has been achieved, which highest among PTAA-based n-i-p devices best our knowledge. The exhibit greatly enhanced stability reproducibility. This approach generic several materials, offering opportunities high without using unstable Spiro-OMeTAD.

Язык: Английский

---

Reduced 0.418 V V_OC-deficit of 1.73 eV wide-bandgap perovskite solar cells assisted by dual chlorides for efficient all-perovskite tandems

Energy & Environmental Science, Год журнала: 2023, Номер 16(5), С. 2080 - 2089

Опубликована: Янв. 1, 2023

Synergistic effects of lead chloride and phenethylammonium suppress the phase segregation non-radiative recombination in 1.73 eV wide- E g perovskite solar cells (PSCs), leading to a significantly reduced V OC -deficit 0.418 V.

Язык: Английский

---

Moisture‐Resilient Perovskite Solar Cells for Enhanced Stability

Advanced Materials, Год журнала: 2023, Номер 36(12)

Опубликована: Апрель 19, 2023

Abstract With the rapid rise in device performance of perovskite solar cells (PSCs), overcoming instabilities under outdoor operating conditions has become most crucial obstacle toward their commercialization. Among stressors such as light, heat, voltage bias, and moisture, latter is arguably critical, it can decompose metal‐halide (MHP) photoactive absorbers instantly through its hygroscopic components (organic cations metal halides). In addition, charge transport layers (CTLs) commonly employed PSCs also degrade presence water. Furthermore, photovoltaic module fabrication encompasses several steps, laser processing, subcell interconnection, encapsulation, during which are exposed to ambient atmosphere. Therefore, a first step long‐term stable photovoltaics, vital engineer materials maximizing moisture resilience, be accomplished by passivating bulk MHP film, introducing passivation interlayers at top contact, exploiting hydrophobic CTLs, encapsulating finished devices with barrier layers, without jeopardizing performance. Here, existing strategies for enhancing stability reviewed pathways moisture‐resilient commercial formulated.

Язык: Английский

---

Fundamental understanding of stability for halide perovskite photovoltaics: The importance of interfaces

Chem, Год журнала: 2023, Номер 10(1), С. 35 - 47

Опубликована: Сен. 29, 2023

Язык: Английский

---