RT Dissertation/Thesis
T1 Metal-halide perovskite for photoconversion: fabrication at ambient conditions and photoelectrochemical characterization
A1 Contreras Bernal, Lidia
K1 Energía solar
K1 Células solares
K1 Perovskita
AB As a result of the increasing worldwide energy demand and the environmentalimpacts resulting from the use of fossil fuels, the search for alternative energyresources is gaining more and more importance. In this context, among thedifferent renewable energies, the field of photovoltaics has undergone rapidprogress in the last few years due to the development of solar cells based onhybrid organic-inorganic halide perovskite materials. The natural abundance ofthe precursors employed to synthesise these materials and their excellentoptoelectronic properties make them potential competitors of well-establishedthin-film photovoltaic technologies such as those based on silicon. However,perovskite solar cells have several fundamental issues such as the lack of longtermstability under environmental conditions (moisture, oxygen, heat andlight), the requirement of expensive materials as contacts and technicallimitations to their industrial scaling that restrict their widespreadcommercialisation.The main aim of this thesis is to provide a fundamental knowledge aimed atunderstanding the physicochemical processes that determine the stability andphotovoltaic performance of perovskite solar devices. In particular, smallperturbation optoelectronic techniques have been used to look at electronicionicprocesses that cause hysteresis phenomena. They have also been used toidentify the main routes of charge recombination for different perovskitedevices and under different moisture conditions. Regarding this, simple modelsfor the interpretation of the different signals obtained from small perturbationtechniques are also provided in this thesis. Another important contribution ofthis work refers to the preparation of perovskites under ambient conditions.Here we have found that the traditional use of relative humidity as controlparameter to fabricate cells should be replaced by the absolute water amount inthe atmosphere in the form of partial water vapour pressure. This last pointopens a new window to facilitate the industrial implementation of perovskitesolar cells because no glove box would limit the area of the devices.
YR 2019
FD 2019
LK http://hdl.handle.net/10433/6889
UL http://hdl.handle.net/10433/6889
LA en
NO Programa de Doctorado en Medio Ambiente y Sociedad
NO Línea de Investigación: Simulación Molecular de Sistemas Complejos con Aplicaciones Medioambientales
NO Clave Programa: DAM
NO Código Línea: 89
NO Universidad Pablo de Olavide de Sevilla. Departamento de Sistemas Físicos, Químicos y Naturales
DS RIO
RD May 22, 2026