Design of Dopant-Free Small Molecular Hole Transport Materials for Perovskite Solar Cells: A Viewpoint from Defect Passivation

Author(s):  
Weihua Tang ◽  
Wanghai Wang ◽  
Jie Zhou

The overwhelming improvement in performance and the cost-effective solution processing enable perovskite solar cells (PVSCs) as a promising technology to photovoltaic industry. Doped hole transport materials (HTMs) based high-efficient PVSCs...

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2592 ◽  
Author(s):  
Funeka Matebese ◽  
Raymond Taziwa ◽  
Dorcas Mutukwa

P-type wide bandgap semiconductor materials such as CuI, NiO, Cu2O and CuSCN are currently undergoing intense research as viable alternative hole transport materials (HTMs) to the spiro-OMeTAD in perovskite solar cells (PSCs). Despite 23.3% efficiency of PSCs, there are still a number of issues in addition to the toxicology of Pb such as instability and high-cost of the current HTM that needs to be urgently addressed. To that end, copper thiocyanate (CuSCN) HTMs in addition to robustness have high stability, high hole mobility, and suitable energy levels as compared to spiro-OMeTAD HTM. CuSCN HTM layer use affordable materials, require short synthesis routes, require simple synthetic techniques such as spin-coating and doctor-blading, thus offer a viable way of developing cost-effective PSCs. HTMs play a vital role in PSCs as they can enhance the performance of a device by reducing charge recombination processes. In this review paper, we report on the current progress of CuSCN HTMs that have been reported to date in PSCs. CuSCN HTMs have shown enhanced stability when exposed to weather elements as the solar devices retained their initial efficiency by a greater percentage. The efficiency reported to date is greater than 20% and has a potential of increasing, as well as maintaining thermal stability.


Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1635
Author(s):  
Sumayya M. Abdulrahim ◽  
Zubair Ahmad ◽  
Jolly Bahadra ◽  
Noora J. Al-Thani

The future photovoltaic technologies based on perovskite materials are aimed to build low tech, truly economical, easily fabricated, broadly deployable, and trustworthy solar cells. Hole transport material (HTM) free perovskite solar cells (PSCs) are among the most likely architectures which hold a distinctive design and provide a simple way to produce large-area and cost-effective manufacture of PSCs. Notably, in the monolithic scheme of the HTM-free PSCs, all layers can be printed using highly reproducible and morphology-controlled methods, and this design has successfully been demonstrated for industrial-scale fabrication. In this review article, we comprehensively describe the recent advancements in the different types of mesoporous (nanostructured) and planar HTM-free PSCs. In addition, the effect of various nanostructures and mesoporous layers on their performance is discussed using the electrochemical impedance spectroscopy (EIS) technique. We bring together the different perspectives that researchers have developed to interpret and analyze the EIS data of the HTM-free PSCs. Their analysis using the EIS tool, the limitations of these studies, and the future work directions to overcome these limitations to enhance the performance of HTM-free PSCs are comprehensively considered.


2019 ◽  
Vol 141 (50) ◽  
pp. 19700-19707 ◽  
Author(s):  
Fuguo Zhang ◽  
Zhaoyang Yao ◽  
Yaxiao Guo ◽  
Yuanyuan Li ◽  
Jan Bergstrand ◽  
...  

CrystEngComm ◽  
2018 ◽  
Vol 20 (47) ◽  
pp. 7677-7687 ◽  
Author(s):  
Siddhant B. Patel ◽  
Amar H. Patel ◽  
Jignasa V. Gohel

CZTS nano-particles are synthesized under ambient condition and applied as low-cost and sustainable inorganic HTM in Perovskite solar cells.


2017 ◽  
Vol 5 (10) ◽  
pp. 1852-1858 ◽  
Author(s):  
Chao Shen ◽  
Marc Courté ◽  
Anurag Krishna ◽  
Shasha Tang ◽  
Denis Fichou

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