Unveiling the Role of Additive Molecular Characteristics in Regulating Chlorine Loss and Phase Distribution for Blue Perovskite Light‐Emitting Diodes

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(51)

Published: Aug. 23, 2024

Abstract Perovskite light‐emitting diodes (PeLEDs) have garnered extraordinary attention in displaying field owing to their excellent luminescence properties. Although exogenous additives are extensively employed for optimizing PeLEDs, comprehensive regulation including side effects still lacks in‐depth study. Here the first time, it is demonstrated that deprotonation degree of significantly influences performance blue PeLEDs. Benzenesulfonic acid (BSA) and ammonium benzenesulfonate (ABS) with similar molecular structures while distinctly different dissociation constants (p K a ) used modifying perovskites. By comparison, high‐p ABS holds greater potential boosting device performance, contributing an improved peak external quantum efficiency 18.8%. This discrepancy ascribed fact low‐p BSA prone induce prominent perovskite chlorine loss its intense deprotonation, suppresses vacancy formation. Meanwhile, adsorption energy organic spacer onto greatly reduced due strong intermolecular hydrogen bonding ABS, concentrated phase arrangement smooth exciton transfer. Additionally, modification further trap‐mediated nonradiative recombination by coordinating undercoordinated lead (II) ions at grain boundaries. work provides valuable guidelines additive screening toward high‐performance

Language: Английский

---

Enhancing the Efficiency and Stability of Inverted Formamidinium-Cesium Lead-Triiodide Perovskite Solar Cells through Lewis Base Pretreatment of Buried Interfaces

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(27), P. 35732 - 35739

Published: June 26, 2024

Mixed components of formamidinium(FA) and cesium (Cs)-based perovskite solar cells are the most hopeful for commercialization owing to their excellent operational phase stabilities, especially devices with inverted structure. The nonradiative recombination carriers can be effectively suppressed through interface optimization, therefore, performance improved. Notably, buried emerges as critical aspects such charge transport, kinetics, morphology films. This study focuses on a straightforward yet effective approach overcome challenges between organic polymers (poly(-triarylamine) (PTAA) FACs-based PTAA substrate is pretreated Lewis base known 2-butynoic acid (BA) C═O functional group. First, it an interfacial buffering layer, harmonizing stress mismatch layers, consequently optimizing crystallization improving film quality. Second, Pb2+ defect passivated at binding group BA molecule. dual-function strategy leads substantial enhancement in both photoelectric conversion efficiency (PCE) stability devices. Finally, PCE device-modified reaches impressive 23.33%. Furthermore, unencapsulated treatment maintain approximately 94% initial after aging maximum power point tracking 1000 h.

Language: Английский

---

Target therapy at buried interfaces toward efficient and stable inorganic perovskite solar cells

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154189 - 154189

Published: July 23, 2024

Language: Английский

---

Synergistic effects of the physical modification and chemical passivation enabling efficient perovskite solar cells

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154864 - 154864

Published: Aug. 23, 2024

Language: Английский

---

Aromatic carboxyl acid regulated nanoparticle deposition and passivation of tin oxide for high performance perovskite solar cells

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157154 - 157154

Published: Oct. 1, 2024

Language: Английский

---