Design and synthesis of polymeric semiconductors for perovskite applications
type: CreativeWork
description: Perovskite solar cells (PSCs) have demonstrated remarkable efficiency growth in their brief history, and are considered to be of exceptional potential for commercialization due to their excellent absorption properties, varied deposition methods, and compatibility with other solar technologies. Furthermore, perovskites are demonstrating high potential for other applications, such as perovskite light emitting diodes (Pero-LEDs), lasers, and radiation detectors. Most perovskite based devices use hole transporting materials (HTMs) to assist in charge separation and current generation. The three main categories of HTM are inorganic materials, small organic molecules, and polymeric materials. Organic materials typically provide the highest efficiencies for these devices, but have several drawbacks including low economic viability, lack of flexibility for use with the various perovskite absorber layers (PALs), and difficulty of application in the multiple device architectures that exist for these devices. This dissertation primarily describes the design and synthesis of new polymeric materials to improve the processibility and interfacial interactions of HTM and PAL, leading to high efficiency, high stability, and low cost PSCs. Our current research into HTMs takes a four-pronged approach; We found that utilizing the Buchwald-Hartwig amination protocol using primary aryl amines and aryl dihalides afforded highly reproducible, high yielding family of polymers, which could be purified by a simple sequence of precipitations. Appropriate selection of pendant functional groups, such as electron donating methoxy, or electron withdrawing fluorine, allowed for highest occupied molecular orbital (HOMO) tuning, as did the utilization of electron rich carbazole versus the neutral fluorene in the polymer backbone. Control of the glass transition temperature (Tg), a characteristic vital to extended lifetime at elevated temperature, was demonstrated by manipulation of the alkyl side cha…
abstract: Perovskite solar cells (PSCs) have demonstrated remarkable efficiency growth in their brief history, and are considered to be of exceptional potential for commercialization due to their excellent absorption properties, varied deposition methods, and compatibility with other solar technologies. Furthermore, perovskites are demonstrating high potential for other applications, such as perovskite light emitting diodes (Pero-LEDs), lasers, and radiation detectors. Most perovskite based devices use hole transporting materials (HTMs) to assist in charge separation and current generation. The three main categories of HTM are inorganic materials, small organic molecules, and polymeric materials. Organic materials typically provide the highest efficiencies for these devices, but have several drawbacks including low economic viability, lack of flexibility for use with the various perovskite absorber layers (PALs), and difficulty of application in the multiple device architectures that exist for these devices. This dissertation primarily describes the design and synthesis of new polymeric materials to improve the processibility and interfacial interactions of HTM and PAL, leading to high efficiency, high stability, and low cost PSCs. Our current research into HTMs takes a four-pronged approach; We found that utilizing the Buchwald-Hartwig amination protocol using primary aryl amines and aryl dihalides afforded highly reproducible, high yielding family of polymers, which could be purified by a simple sequence of precipitations. Appropriate selection of pendant functional groups, such as electron donating methoxy, or electron withdrawing fluorine, allowed for highest occupied molecular orbital (HOMO) tuning, as did the utilization of electron rich carbazole versus the neutral fluorene in the polymer backbone. Control of the glass transition temperature (Tg), a characteristic vital to extended lifetime at elevated temperature, was demonstrated by manipulation of the alkyl side cha…
author: Astridge, Daniel D.
language: eng
language: English
keywords: Buchwald-Hartwig, perovskite, polymer, semiconductor, solar cell, synthesis
identifier: T 9470
date published: 2022
date modified: 2026-07-24T01:42:22Z
provider: Colorado School of Mines
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Colorado School of Mines. Arthur Lakes Library

PropertyValue
property ID: Handle
value: https://hdl.handle.net/11124/176628