CHOSERICERCAPUBBLICAZIONIENHANCED CHARGE SEPARATION EFFICIENCY IN DNA TEMPLATED POLYMER SOLAR CELLS

ENHANCED CHARGE SEPARATION EFFICIENCY IN DNA TEMPLATED POLYMER SOLAR CELLS

 

insertion DNA nanolayer into polymer based solar cells

ABSTRACT

The insertion of a DNA nanolayer into polymer based solar cells, between the electron transport layer (ETL) and the active material, is proposed to improve the charge separation efficiency. Complete bulk heterojunction donor–acceptor solar cells of the layered type glass/electrode (indium tin oxide)/ETL/P3HT:PC70BM/hole transport layer/electrode (Ag) are investigated using femtosecond transient absorption spectroscopy both in the NIR and the UV–vis regions of the spectrum. The transient spectral changes indicate that when the DNA is deposited on the ZnO nanoparticles (ZnO‐NPs) it can imprint a different long range order on the poly(3‐hexylthiophene) (P3HT) polymer with respect to the non‐ZnO‐NPs/DNA containing cells. This leads to a larger delocalization of the initially formed exciton and its faster quenching which is attributed to more efficient exciton dissociation. Finally, the temporal response of the NIR absorption shows that the DNA promotes more efficient production of charge transfer states and free polarons in the P3HT cation indicating that the increased exciton dissociation correlates with increased charge separation.

Francesco Toschi, Daniele Catone, Patrick O'Keeffe, Alessandra Paladini, Stefano Turchini, Janardan Dagar, Thomas M. Brown

DOI: 10.1002/adfm.201707126

https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201707126

 

 

logo University of Rome Tor Vergata
Università degli Studi di Roma
"Tor Vergata"


logo Regione Lazio

Questo sito web utilizza i cookie per capire come viene utilizzato il sito e per permettere l'accesso all'area riservata. I cookie non permettono di identificare l'utente. I cookie sono salvati sul tuo browser e sono utlizzati per personalizzare la tua esperienza sul nostro sito web. Continuando la navigazione sul nostro sito senza modificare le impostazioni, accetti il nostro utilizzo dei cookie. Comunque potrai modificare le tue impostazioni dei cookie in qualsiasi momento.