Inorganic wide-bandgap perovskite subcells with dipole bridge for all-perovskite tandems

Nature Energy, Год журнала: 2023, Номер 8(6), С. 610 - 620

Опубликована: Апрель 13, 2023

Язык: Английский

---

Modulating buried interface with multi-fluorine containing organic molecule toward efficient NiO -based inverted perovskite solar cell

Nano Energy, Год журнала: 2023, Номер 111, С. 108363 - 108363

Опубликована: Март 22, 2023

Язык: Английский

---

Tailored Cysteine‐Derived Molecular Structures toward Efficient and Stable Inorganic Perovskite Solar Cells

Advanced Materials, Год журнала: 2023, Номер 35(31)

Опубликована: Март 27, 2023

Abstract Surface–defect‐triggered non‐radiative charge recombination and poor stability have become the main roadblock to continued improvement in inorganic perovskite solar cells (PSCs). Herein, culprits are identified on surface by first‐principles calculations, purposefully design a brand‐new passivator, Boc‐S‐4‐methoxy‐benzyl‐l‐cysteine (BMBC), whose multiple Lewis‐based functional groups (NH, S CO) suppress halide vacancies coordinate with undercoordinated Pb 2+ through typical Lewis baseacid reactions. The tailored electron‐donating methoxyl group (CH 3 O–) can cause an increased electron density benzene ring, which strengthens interaction via electrostatic interactions. This BMBC passivation reduce trap density, enlarge grains, prolong lifetime, more suitable energy‐level alignment. In addition, hydrophobic tert‐butyl butoxycarbonyl (Boc‐) ensures that is uniformly covered prevents harmful aggregation steric repulsion at perovskite/hole–transporting layer (HTL) interface, thus providing umbrella resist moisture invasion. Consequently, combination of above increases efficiency CsPbI 3−x Br x PSC from 18.6% 21.8%, highest for this type metal PSCs so far, as far it known. Moreover, device exhibits higher environmental thermal stability.

Язык: Английский

---

Interface Modification for Efficient and Stable Inverted Inorganic Perovskite Solar Cells

Advanced Materials, Год журнала: 2023, Номер 35(31)

Опубликована: Июнь 7, 2023

Due to their excellent thermal stability and ideal bandgap, metal halide inorganic perovskite based solar cells (PSCs) with inverted structure are considered as an choice for perovskite/silicon tandem cells. However, the power conversion efficiency (PCE) of still lags far behind that conventional n-i-p PSCs due interfacial energy level mismatch high nonradiative charge recombination. Herein, performance is significantly improved by engineering CsPbI3-x Brx films 2-mercapto-1-methylimidazole (MMI). It found mercapto group can preferably react undercoordinated Pb2+ from forming Pb-S bonds, which appreciably reduces surface trap density. Moreover, MMI modification results in a better alignment electron-transporting material, promoting carrier transfer reducing voltage deficit. The above combination open-circuit enhancement 120 mV, yielding champion PCE 20.6% 0.09 cm2 area 17.3% 1 area. Furthermore, ambient, operational heat stabilities also greatly improved. work demonstrates simple but effective approach fabricating highly efficient stable PSCs.

Язык: Английский

---

Mixed‐Halide Inorganic Perovskite Solar Cells: Opportunities and Challenges

Advanced Optical Materials, Год журнала: 2023, Номер 11(20)

Опубликована: Авг. 23, 2023

Abstract Recently, mixed‐halide inorganic CsPbI 3− x Br perovskite solar cells (PSCs) have had a rapid advancement, which offers balanced efficiency, stability, tunable bandgap, and potential for indoor photovoltaic applications. Despite these advantages, significant challenges remain in the phase segregation phenomena, trap state density, absorption range limitations. This review presents an analysis of crystal electronic structure optical properties , as well in‐depth look at high‐quality film preparation, inhibition solutions, interface engineering, highlighting critical role modification performance PSCs. Furthermore, how PSCs can be strong candidates photovoltaics because their adjustable bandgap that enables them to better match notable strength stability is discussed. Finally, provides perspectives address development bottlenecks inspires future research prospects concerning

Язык: Английский

---

Managing Multiple Halide‐Related Defects for Efficient and Stable Inorganic Perovskite Solar Cells

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(30)

Опубликована: Май 25, 2023

Abstract Halide‐related surface defects on inorganic halide perovskite not only induce charge recombination but also severely limit the long‐term stability of solar cells. Herein, adopting density functional theory calculation, we verify that iodine interstitials (I i ) has a low formation energy similar to vacancy (V I and is readily formed all‐inorganic perovskite, it regarded function as an electron trap. We screen specific 2,6‐diaminopyridine (2,6‐DAPy) passivator, which, with aid combined effects from halogen‐N pyridine coordination bonds, successfully eliminates dissociative 2 passivates abundant V . Furthermore, two symmetric neighboring ‐NH groups interact adjacent halides octahedral cluster by forming hydrogen which further promotes adsorption 2,6‐DAPy molecules onto surface. Such synergetic can significantly passivate harmful iodine‐related undercoordinated Pb 2+ , prolong carrier lifetimes facilitate interfacial hole transfer. Consequently, these merits enhance power‐conversion efficiency (PCE) 19.6 % 21.8 %, highest value for this type cells, just importantly, 2,6‐DAPy‐treated CsPbI 3− x Br films show better environmental stability.

Язык: Английский

---

Inorganic Perovskite Surface Reconfiguration for Stable Inverted Solar Cells with 20.38% Efficiency and Its Application in Tandem Devices

Advanced Materials, Год журнала: 2023, Номер 35(28)

Опубликована: Апрель 13, 2023

Inorganic perovskite solar cells (IPSCs) have garnered attention in tandem (TSCs) due to their suitable bandgap and impressive thermal stability. However, the efficiency of inverted IPSCs has been limited by high trap density on top surface inorganic film. Herein, a method for fabricating efficient reconfiguring properties CsPbI2.85 Br0.15 film with 2-amino-5-bromobenzamide (ABA) is developed. This modification not only exhibits synergistic coordination carbonyl (C=O) amino (NH2 ) groups uncoordinated Pb2+ , but also Br fills halide vacancies suppresses formation Pb0 effectively passivating defective surface. As result, champion 20.38%, highest reported date achieved. Furthermore, successful fabrication p-i-n type monolithic perovskite/silicon TSCs an 25.31% first time demonstrated. Crucially, unencapsulated ABA-treated shows enhanced photostability, retaining 80.33% its initial after 270 h, stability (maintain 85.98% 300 h at 65 °C). The retains 92.59% 200 under continuous illumination ambient air.

Язык: Английский

---

Stabilizing Precursor Solution and Controlling Crystallization Kinetics Simultaneously for High‐Performance Perovskite Solar Cells

Advanced Materials, Год журнала: 2023, Номер 35(44)

Опубликована: Сен. 5, 2023

The efficiency of metal halide perovskite solar cells (PSCs) has skyrocketed; however, defects created by aging precursor solutions and during crystallization pose a significant barrier to the reproducibility cells. In this work, fluoro-N,N,N″,N″-tetramethylformamidinium hexafluorophosphate (F-(CH3 )4 CN2 PF6 , abbreviated as TFFH) is introduced stabilize solution improve dynamics simultaneously for high-performance formamidinium lead iodide (FAPbI3 )-based indoor photovoltaics. TFFH stabilizes inhibiting oxidation I- reducing newly generated I0 passivates undercoordinated Pb2+ interacting with Pb─I framework. Time-resolved optical diagnostics show prolonged in situ defect passivation due presence strong FA+ ···TFFH···Pb─I interaction. Simultaneous regulation guarantee larger grain sizes, better crystal orientation, fewer more efficient charge extraction PSCs. optimized PSCs achieve improved stability reach an 42.43% at illumination 1002 lux, which highest among all It anticipated that concurrent stabilization will emerge prevalent approach enhancing perovskite.

Язык: Английский

---

Understanding the Role of Fluorine Groups in Passivating Defects for Perovskite Solar Cells

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(45)

Опубликована: Сен. 22, 2023

Introducing fluorine (F) groups into a passivator plays an important role in enhancing the defect passivation effect for perovskite film, which is usually attributed to direct interaction of F and states. However, between electronegative electron-rich same molecule, may influence effect, ignored. We herein report that such interactions can vary electron cloud distribution around thus changing their coordination with sites. By comparing two fluorinated molecules, heptafluorobutylamine (HFBM) heptafluorobutyric acid (HFBA), we find F/-NH2 HFBM stronger than F/-COOH one HFBA, inducing weaker ability HFBA. Accordingly, HFBA-based solar cells (PSCs) provide efficiency 24.70 % excellent long-term stability. Moreover, large-area module (14.0 cm2 ) based on HFBA reaches 21.13 %. Our work offers insight understanding unaware group impacting film.

Язык: Английский

---

All–Inorganic Perovskite Solar Cells: Defect Regulation and Emerging Applications in Extreme Environments

Advanced Materials, Год журнала: 2024, Номер 36(25)

Опубликована: Март 11, 2024

Abstract All–inorganic perovskite solar cells (PSCs), such as CsPbX 3 , have garnered considerable attention recently, they exhibit superior thermodynamic and optoelectronic stabilities compared to the organic–inorganic hybrid PSCs. However, power conversion efficiency (PCE) of PSCs is generally lower than that PSCs, contain higher defect densities at interface within light‐absorbing layers, resulting in non‐radiative recombination voltage loss. Consequently, regulation has been adopted an important strategy improve device performance stability. This review aims comprehensively summarize recent progresses on well their cutting‐edge applications extreme scenarios. The underlying fundamental mechanisms leading formation crystal structure are firstly discussed, overview literature‐adopted strategies context interface, internal, surface engineering provided. Cutting‐edge environments outer space underwater situations highlighted. Finally, a summary outlook presented future directions for achieving efficiencies stability

Язык: Английский

---