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<p>In this work, colloidal quantum dot solar cells are fabricated with directly synthesized PbS-I colloidal quantum dots as n-type materials and polymers (PTB7-Th and PBDB-T) instead of conventional p-type (PbS-EDT) layers. The direct synthesis of PbS-I colloidal QDs made it possible to bypass the ligands-exchange process, enabling the fabrication process to be much simpler than the conventional counterparts available. Furthermore, the devices were characterized both in 1 Sun (AM 1.5G) and in dark conditions to study the photovoltaic and diode performance. The PbS-CQD solar cells based on PTB7-Th achieved the superior PCE of 6.24%, while the devices using PBDB-T only exhibited a PCE of 3.23%, which is due to enhancement of charge generation and charge dissociation efficiency at the PbS/PTB7-Th interface. Such an approach stresses that polymers can be used as potential components for solution-processable p-type materials and opens up new possibilities in the use of more accessible and scalable manufacturing techniques in quantum dot photovoltaics.</p>

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Utilization of polymer hole transport layer in efficient ligands-exchange-free processed PbS-I colloidal quantum dot solar cells

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Gaurav Gupta,
  • S. Shyam Shankar,
  • Subhayan Biswas,
  • Ganesh D. Sharma

摘要

In this work, colloidal quantum dot solar cells are fabricated with directly synthesized PbS-I colloidal quantum dots as n-type materials and polymers (PTB7-Th and PBDB-T) instead of conventional p-type (PbS-EDT) layers. The direct synthesis of PbS-I colloidal QDs made it possible to bypass the ligands-exchange process, enabling the fabrication process to be much simpler than the conventional counterparts available. Furthermore, the devices were characterized both in 1 Sun (AM 1.5G) and in dark conditions to study the photovoltaic and diode performance. The PbS-CQD solar cells based on PTB7-Th achieved the superior PCE of 6.24%, while the devices using PBDB-T only exhibited a PCE of 3.23%, which is due to enhancement of charge generation and charge dissociation efficiency at the PbS/PTB7-Th interface. Such an approach stresses that polymers can be used as potential components for solution-processable p-type materials and opens up new possibilities in the use of more accessible and scalable manufacturing techniques in quantum dot photovoltaics.