Enhanced Perovskite Photovoltaics with Non-conjugated Polymers: Recent Developments and Future Prospects

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(7), С. 3573 - 3610

Опубликована: Март 20, 2024

The rapid development of organic–inorganic hybrid perovskite has positioned it as an auspicious material for solar cells, given its high efficiency, flexibility, and cost-effectiveness. Since introduction in 2009, cells (PSCs) have witnessed a remarkable increase power conversion efficiency (PCE) from 3.8% to 26.1%. This review delves into various nonconjugated polymer (NCP) strategies that played crucial role the success devices, encompassing modifiers electron transport layer (ETL), templates facilitating growth, interface layers devices. aims comprehensively outline application NCP materials PSCs, with potential advantages including enhanced charge extraction transmission, improved light capture, device stability, reduced hysteresis.

Язык: Английский

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Surface Regulation via Carboxylate Polymer for Efficient and Stable CsPbI₂Br Perovskite Solar Cells

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 7, 2024

Abstract CsPbI 2 Br perovskite solar cell (PSC) is a promising candidate for high‐efficiency single‐junction and tandem cells. However, due to the numerous surface defects of film mismatch energy levels at Br/charge transport layer interface, power conversion efficiency (PCE) PSC still significantly lower than theoretical limits. To alleviate those issues, in this work, carboxylate‐based p‐type polymer, TTC‐Cl, employed modify layer. TTC‐Cl can interact with uncoordinated Pb 2+ , thereby mitigating surficial reducing non‐radiative recombination losses. Furthermore, also improves band properties thin surface, rendering it more p‐type, which facilitates hole transport. Consequently, PSCs modification achieve remarkable PCE 17.81%, notably higher that counterpart without (15.87%). Moreover, exhibit better stability. This work highlights importance regulation via carboxylate polymer further enhancing performance PSCs.

Язык: Английский

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Near‐Stoichiometric and Homogenized Perovskite Films for Solar Cells with Minimized Performance Variation

Angewandte Chemie, Год журнала: 2023, Номер 135(17)

Опубликована: Фев. 22, 2023

Abstract Mixed‐cation, small band‐gap perovskites via rationally alloying formamidinium (FA) and methylammonium (MA) together have been widely employed for blade‐coated perovskite solar cells with satisfied efficiencies. One of the stringent challenges lies in difficult control nucleation crystallization kinetics mixed ingredients. Herein, a pre‐seeding strategy by mixing FAPbI 3 solution pre‐synthesized MAPbI microcrystals has developed to smartly decouple process. As result, time window initialized greatly extended folds (i.e. from 5 s 20 s), which enables formation uniform homogeneous alloyed‐FAMA films designated stoichiometric ratios. The resultant achieved champion efficiency 24.31 % accompanied outstanding reproducibility more than 87 devices showing efficiencies higher 23 %.

Язык: Английский

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Self‐Polymerized Spiro‐Type Interfacial Molecule toward Efficient and Stable Perovskite Solar Cells

Angewandte Chemie, Год журнала: 2024, Номер 136(20)

Опубликована: Фев. 26, 2024

Abstract In the pursuit of highly efficient perovskite solar cells, spiro‐OMeTAD has demonstrated recorded power conversion efficiencies (PCEs), however, stability issue remains one bottlenecks constraining its commercial development. this study, we successfully synthesize a novel self‐polymerized spiro‐type interfacial molecule, termed v‐spiro. The linearly arranged molecule exhibits stronger intermolecular interactions and higher intrinsic hole mobility compared to spiro‐OMeTAD. Importantly, vinyl groups in v‐spiro enable situ polymerization, forming polymeric protective layer on film surface, which proves effective suppressing moisture degradation ion migration. Utilizing these advantages, poly‐v‐spiro‐based device achieves an outstanding efficiency 24.54 %, with enhanced open‐circuit voltage 1.173 V fill factor 81.11 owing reduced defect density, energy level alignment extraction. Furthermore, operational unencapsulated devices is significantly enhanced, maintaining initial above 90 % even after 2000 hours under approximately 60 humidity or 1250 continuous AM 1.5G sunlight exposure. This work presents comprehensive approach achieving both high long‐term PSCs through innovative design.

Язык: Английский

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Functional design and understanding of effective additives for achieving high-quality perovskite films and passivating surface defects

Journal of Energy Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Язык: Английский

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