Video Experimental Relacionado

Updated: Jan 18, 2026

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

Mejora de la estabilidad morfológica a largo plazo en células solares orgánicas BHJ mediante cadenas laterales

Haoyu Zhao¹, Jordan Shanahan², Jiyeon Oh²

¹School of Polymer Science and Engineering, Center for Optoelectronic Materials and Devices, The University of Southern Mississippi Hattiesburg MS 39406 USA xiaodan.gu@usm.edu.

Chemical science

|January 16, 2026

Resumen

Las células solares orgánicas (OSC) logran una alta eficiencia, pero la estabilidad es clave. Este estudio utiliza cadenas laterales termoclivables para mejorar la estabilidad morfológica y térmica en OSC, mejorando el rendimiento a largo plazo.

Área de la Ciencia:

Ciencia de Materiales
Electrónica Orgánica
Fotovoltaica

Sus antecedentes:

Las células solares orgánicas (OSC) muestran altas eficiencias de conversión de potencia (PCE) superiores al 20%.
La estabilidad operativa a largo plazo es un obstáculo importante para la comercialización de OSC.
La estabilidad morfológica de la capa de heterounión a granel (BHJ) es fundamental para el rendimiento sostenido del dispositivo.

Objetivo del estudio:

Mejorar la estabilidad morfológica y térmica de las OSC.
Investigar el uso de cadenas laterales termoclivables (TCS) en materiales donadores y aceptores.
Evaluar el impacto de TCS en la morfología BHJ y la estabilidad del dispositivo.

Principales métodos:

Se incorporaron TCS en un polímero donador conjugado (PffBT-4T-TCS) y un aceptor de fullereno (C60-TCS).
Se analizó la morfología BHJ utilizando microscopía de fuerza atómica acoplada a espectroscopía infrarroja (AFM-IR) antes y después del tratamiento térmico.
Se evaluó la estabilidad del dispositivo bajo estrés térmico (85 °C durante 10 semanas) y se midió la PCE normalizada.

Principales resultados:

La escisión térmica de las cadenas laterales de alquilo aumentó la temperatura de transición vítrea de PffBT-4T-TCS en 60 °C.
La morfología BHJ se mantuvo estable después de la escisión, con una composición donador/aceptor y una rugosidad superficial consistentes.
Los dispositivos mantuvieron la estabilidad durante más de 10 semanas a 85 °C, lo que indica una mayor resiliencia morfológica y térmica.

Conclusiones:

La estrategia de cadena lateral termoclivable mejora eficazmente la estabilidad morfológica y térmica en las OSC.
Este enfoque ofrece una vía prometedora para lograr tanto alta eficiencia como estabilidad operativa a largo plazo en dispositivos solares orgánicos.
Una morfología BHJ estable es crucial para un rendimiento fiable y duradero de las células solares orgánicas.

Palabras clave:

células solares orgánicas estabilidad morfológica cadenas laterales termoclivables estrés térmico heterounión a granel polímeros conjugados eficiencia de conversión de potencia

Más Videos Relacionados

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization

Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization

Published on: January 29, 2017

Videos de Conceptos Relacionados

Stability of Conjugated Dienes

Stability of Conjugated Dienes

Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.

Anionic Chain-Growth Polymerization: Overview

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...

Stability of Substituted Cyclohexanes

Stability of Substituted Cyclohexanes

This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...

Electrophilic Addition of HX to 1,3-Butadiene: Thermodynamic vs Kinetic Control

Electrophilic Addition of HX to 1,3-Butadiene: Thermodynamic vs Kinetic Control

The addition of a hydrogen halide to 1,3-butadiene gives a mixture of 1,2- and 1,4-adducts. Since more substituted alkenes are more stable, the 1,4-adduct is expected to be the major product. However, the product distribution is strongly influenced by temperature; low temperature favors the 1,2-adduct, whereas the 1,4-adduct is predominant at high temperature.

Cationic Chain-Growth Polymerization: Mechanism

Cationic Chain-Growth Polymerization: Mechanism

The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...

Anionic Chain-Growth Polymerization: Mechanism

Anionic Chain-Growth Polymerization: Mechanism

The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...