New Hole Transporting Materials for Perovskite Solar Cells
A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Energy Materials".
Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 21625
Special Issue Editor
Special Issue Information
Dear Colleagues,
In the last few years, hybrid metal halide perovskites have attracted enormous attention thanks to their unique combination of electrical and optical properties. They bring together high absorption coefficients, long carrier diffusion lengths, and low cost processability, opening new avenues for optoelectronic and photovoltaic applications.
A critical component in the PV system is the hole transporting material (HTM), which is essential for extracting the positive charges from the light absorber to the electrode. However, the most efficient options to date rely on expensive semiconductors synthesized in multistep procedures and extensive product purification, such as 2,2′7,7′-tetrakis-(N,N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (spiro-OMeTAD), a persistent caveat for their consolidation as a cost-effective technology.
Additionally, even though perovskite technology can overcome the current limits on PV manufacturing, it must comply with a lifetime expectation comparable to silicon-wafer based modules. However, due to the low conductivity of many HTMs in their pristine form they usually require the incorporation of dopants/additives to the layer, with limited stability. Moreover, perovskite materials suffer from severe decomposition activated by high temperature, ultraviolet light, and contamination from the environment. Though the mechanism is still not fully understood, recent investigations have put a great emphasis on the interfacial region, pointing out surface defects as plausible mediators inducing degradation. Therefore, not only are HTMs necessary to efficiently extract the photogenerated carriers at a low material cost, but also the surface passivation at the HTM interface could become a decissive factor to make this technology market-viable.
In this Special Issue, we would like to cover all important aspects concerning novel HTMs applied to perovskite PV, including photopysical investigations, studies on molecular interactions and aggregate formations, as well as innovations in solar cell architectures.
It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.
Dr. Cristina Roldán Carmona
Guest Editor
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Keywords
- dopant-free
- photovoltaic stability
- surface passivation
- perovskite solar cells
- low-cost
