Two simple small molecules are designed and successfully implemented here as hole-transporting material (HTM) in perovskite-based solar cells (PSCs). With the aim of elucidating the interconnection between molecular structure, properties, and their role in the working devices, these HTMs are implemented in both thin planar direct (n–i–p) and inverse (p–i–n) geometries. It is observed how the HTM layer morphology influences the photovoltaic performance. Moreover, from analysis of the different devices, fundamental information is retrieved on the factors influencing small molecule hole extracting/transporting functionality in PSCs. Specifically, two main roles are identified: When HTMs are introduced as growing substrate (p–i–n), there is a positive impact on the device performance via influence of perovskite formation; meanwhile, their efficacy in transporting the holes governs the performance of direct configurations (n–i–p). These findings can be extended to a wide family of small molecule HTMs, providing general rules for refining the design of novel and more efficient ones.

Addressing the Function of Easily Synthesized Hole Transporters in Direct and Inverted Perovskite Solar Cells

Suranna Gian Paolo
Membro del Collaboration Group
;
Listorti Andrea;
2018

Abstract

Two simple small molecules are designed and successfully implemented here as hole-transporting material (HTM) in perovskite-based solar cells (PSCs). With the aim of elucidating the interconnection between molecular structure, properties, and their role in the working devices, these HTMs are implemented in both thin planar direct (n–i–p) and inverse (p–i–n) geometries. It is observed how the HTM layer morphology influences the photovoltaic performance. Moreover, from analysis of the different devices, fundamental information is retrieved on the factors influencing small molecule hole extracting/transporting functionality in PSCs. Specifically, two main roles are identified: When HTMs are introduced as growing substrate (p–i–n), there is a positive impact on the device performance via influence of perovskite formation; meanwhile, their efficacy in transporting the holes governs the performance of direct configurations (n–i–p). These findings can be extended to a wide family of small molecule HTMs, providing general rules for refining the design of novel and more efficient ones.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/261802
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 27
  • ???jsp.display-item.citation.isi??? 26
social impact