Achieving high power efficiency and low roll-off OLEDs based on energy transfer from thermally activated delayed excitons to fluorescent dopants
Shipan Wang; Yuewei Zhang; Weiping Chen; Jinbei Wei; Yu Liu; Yue Wang; Chem.Commun. 51 (2015) 11972–; doi:10.1039/C5cc04469C

data_7117528
_publ_section_title
;
 Achieving high power efficiency and low roll-off OLEDs based on energy
 transfer from thermally activated delayed excitons to fluorescent dopants
;
_journal_name_full               Chem.Commun.
_journal_page_first              11972
_journal_paper_doi               10.1039/C5cc04469C
_journal_volume                  51
_journal_year                    2015
_chemical_formula_sum            'C56 H32 N6'
_chemical_formula_weight         788.88
_chemical_name_common            4CzIPN
_chemical_name_systematic
(4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-03-07 deposited with the CCDC.
2015-06-26 downloaded from the CCDC.
;
_cell_angle_alpha                77.99(3)
_cell_angle_beta                 83.67(3)
_cell_angle_gamma                89.86(3)
_cell_formula_units_Z            4
_cell_length_a                   9.0000(18)
_cell_length_b                   19.580(4)
_cell_length_c                   23.930(5)
_cell_measurement_reflns_used    1118
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      50
_cell_measurement_theta_min      3.02
_cell_volume                     4098.6(15)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.953
_diffrn_measured_fraction_theta_max 0.953
_diffrn_measurement_device_type  'Bruker APEX2 CCD'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0854
_diffrn_reflns_av_sigmaI/netI    0.1170
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            30783
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.02
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_T_max  0.9849
_exptl_absorpt_correction_T_min  0.9849
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.278
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1640
_exptl_crystal_preparation       Luminescent
_exptl_crystal_recrystallization_method Sublimation
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.250
_refine_diff_density_min         -0.297
_refine_diff_density_rms         0.062
_refine_ls_extinction_coef       0.0029(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.946
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1118
_refine_ls_number_reflns         13789
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.946
_refine_ls_R_factor_all          0.1691
_refine_ls_R_factor_gt           0.0720
_refine_ls_shift/su_max          0.066
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1020P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1603
_refine_ls_wR_factor_ref         0.2145
_reflns_number_gt                6142
_reflns_number_total             13789
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5cc04469c2.cif
_cod_data_source_block           1
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7117528