TY - JOUR
T1 - Broadband phototransistors realised by incorporating a bi-layer perovskite/NIR light absorbing polymer channel
AU - Li, Ning
AU - Lei, Yanlian
AU - Chan, Wing Kin Edward
AU - ZHU, Fu Rong
N1 - Funding Information:
This work was financially supported by the Research Grants Council of the Hong Kong Special Administrative Region, China, General Research Fund (GRF/12302817) and the Hong Kong Baptist University Inter-institutional Collaborative Research Scheme (RC-ICRS/15-16/04).
PY - 2019/4/28
Y1 - 2019/4/28
N2 - High performing ultraviolet (UV) to near infrared (NIR) light broadband phototransistors (PTs) are realised by incorporating a bi-layer methylammonium lead triiodide (MAPbI3) perovskite/NIR light absorbing diketopyrrolopyrrole-dithienylthieno[3,2-b]thiophene (DPP-DTT) polymer channel. The bi-layer MAPbI3/DPP-DTT channel has the advantages of the (1) complementary absorption and (2) high charge transport efficiency of the two materials. The on- and off-state transfer characteristics of the bi-layer MAPbI3/DPP-DTT channel PTs, in the presence of different intensities of UV, visible and NIR light, were analyzed. The bi-layer MAPbI3/DPP-DTT channel PTs possess simultaneously a specific detectivity (D∗) of >109 Jones over the UV to visible light wavelength range and a high D∗ of >107 Jones over the NIR light wavelength range. The broadband PTs can be operated at a low voltage (-1 V) without showing persistent photoconductivity behavior. The results are very encouraging. It is anticipated that the bi-layer perovskite/NIR light absorbing polymer channel concept is a very promising approach for realising high performance UV to NIR light broadband PTs.
AB - High performing ultraviolet (UV) to near infrared (NIR) light broadband phototransistors (PTs) are realised by incorporating a bi-layer methylammonium lead triiodide (MAPbI3) perovskite/NIR light absorbing diketopyrrolopyrrole-dithienylthieno[3,2-b]thiophene (DPP-DTT) polymer channel. The bi-layer MAPbI3/DPP-DTT channel has the advantages of the (1) complementary absorption and (2) high charge transport efficiency of the two materials. The on- and off-state transfer characteristics of the bi-layer MAPbI3/DPP-DTT channel PTs, in the presence of different intensities of UV, visible and NIR light, were analyzed. The bi-layer MAPbI3/DPP-DTT channel PTs possess simultaneously a specific detectivity (D∗) of >109 Jones over the UV to visible light wavelength range and a high D∗ of >107 Jones over the NIR light wavelength range. The broadband PTs can be operated at a low voltage (-1 V) without showing persistent photoconductivity behavior. The results are very encouraging. It is anticipated that the bi-layer perovskite/NIR light absorbing polymer channel concept is a very promising approach for realising high performance UV to NIR light broadband PTs.
UR - http://www.scopus.com/inward/record.url?scp=85065168740&partnerID=8YFLogxK
UR - https://pubs.rsc.org/en/content/articlelanding/2019/tc/c8tc06229c
U2 - 10.1039/c8tc06229c
DO - 10.1039/c8tc06229c
M3 - Journal article
AN - SCOPUS:85065168740
SN - 2050-7526
VL - 7
SP - 4808
EP - 4816
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 16
ER -