Molecular engineering for high-performance fullerene broadband photodetectors

Abstract

The NiTPP-C60 large-area single-crystal arrays photodetector, which combines the excellent light absorption properties of porphyrin and the good electron transport properties of fullerenes, shows a fast light response and high responsivity.

Ultrafast and Stable Organic Single‐Crystal Vertical Phototransistor for Self‐Powered Photodetection and High‐Speed Imaging

“…In Figure 2b, we calculated the responsivity (R = I ph /P in ) under different gate voltages, and the maximum value can reach up to 40 000 A W −1 under low light intensity, which is higher than that of most reported singlecrystal organic detectors. [9,10,[23][24][25] Such high responsivity could be attributed to the multiple aspects. First, compared to the lateral device, such vertical device has a larger junction area for efficient photon absorption.…”

Efficacy assessment of metalloporphyrins as functional materials for photodetection applications: role of central tetrapyrrole metal ions

“…The N and M-bands are ascribed to the electronic transitions from HOMO level 3a 2u (p) and 1b 1u (p) to 5e g (p*) LUMO, respectively [38,76,77]. Next, the observed intense Soret B-band and weak Q-band result from the electronic transitions from to a 2u (p) HOMO to e g (p*) LUMO and from a 1u (p) HOMO to e g (p*) LUMO, respectively [19,38,74,76]. Particularly, the intensity ratio between Q and B bands measures the mixing degree of transition metal d-orbitals and porphyrin molecular orbitals, where the greater the mixing degree, the closer the energy of unmixed states [20].…”

“…The responsivity value of CuTPP/n-Si heterojunction is higher than that of other organic/n-Si heterojunctions such as Cu(acac) 2 /n-Si [92], a-6 T/n-Si [99], pentacene/n-Si [100], MG/n-Si [101], and TPPFT/n-Si [102]. But unfortunately, it possesses a lower responsivity than that of the TPD/n-Si heterojunction [90], NiTPP-C 60 / SiO 2 /Si [19], and graphene/n-Si [103]. Moreover, the capability of the fabricated devices to pick up the faintest light signals is illustrated from the obtained values of specific detectivity, D*, that are shown in Fig.…”

“…Metalloporphyrins were used in different designs such as dye-sensitized solar cells with a maximum PCE * 12.3% [8][9][10][11], organic/inorganic heterojunction solar cells with PCE in the range of (2-5.6) % [12][13][14], hybrid molecular solar cells [15], and bulk heterojunction solar cells [16]. Moreover, metalloporphyrins are employed as the main constituent of organic light-emitting diodes (OLEDs) manufacture [17,18] and broadband photodetectors [19].…”

Pyrrolidino[2,1–a]phthalazino[60]fullerenes: A New Family of Fullerene Derivatives for Photovoltaic Applications

“…[3][4][5][6][7] Fullerene derivatives also represent promising solutionprocessible n-type semiconductors for various organic electronic circuits and functional devices: sensors, memory elements, photodetectors, and so on. [8][9][10][11] Furthermore, fullerene derivatives are intensively explored for biomedical applications due to their unique antioxidant, antiviral, and antitumor activities. [12][13][14] Therefore, the design of novel types of fullerene-based materials with tailored properties remains an urgent task relevant to various fields of science.…”